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Direction 75 Suppression under the Plenary Powers of the family group name Urinatoridae (correction of Urinatores) Vieillot, 1818, and addition to the Official List of Family Group Names in Zoology of the names Podicipitidae (correction of Podicepinae Bonaparte, 1831, and Gaviidae Coues, 1903, as the family-group names for Grebes and Divers (Loons) respectively (class Aves) (Direction supplementary to Opinion 401)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 13, issue 22, pages 291-308

Direction 62 Addition to the Official List of Family-group Names in Zoology or, as the case may be, to the Official Index of Rejected and Invalid family-group names in Zoology of the family-group names Involved in the Cases dealt with in volume 14 of the work Opinions and Declarations rendered by the International Commission on Zoological nomenclature, other than names already dealt with either in Opinions included in that volume or in a separate Direction

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 14, issue 23, pages 459-470

Opinion 446 Addition to the Official List of Generic Names in Zoology of the generic name Phorodon Passerini, 1860 (class Insecta, order Hemiptera)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, pages 199-210

Proposed addition of the name "Phorodon" Passerini, 1860 (Class Insecta, Order Hemiptera), to the "Official List of Generic Names in Zoology" and of "humuli" Schrank, 1801, as published in the combination "Aphis humuli", to the "Official List of Specific

Published in Opinions and Declarations Rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, pages 203-204

Withdrawal from the scope of Voting Paper V.P.(55)27 of the proposal submitted therewith in relation to the specific name "pruni" Scopoli, 1763, as published in the combination "Aphis pruni" In Opinion 446. Addition to the Official List of Generic Names i

Published in Opinions and Declarations Rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, pages 207-208

Opinion 455 Validation under the Plenary Powers (a) of the emendation to Sphenodon of the generic name Sphaenodon Gray (J. E.), 1831, and (B) of the family-group name Sphenodontidae Cope, 1870 (class Reptilia)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, pages 379-392

Opinion 460. Validation under the plenary powers of the generic name "Muntiacus" Rafinesque, 1815, and designation for the genus so named of a type species in harmony with accustomed usage (Class Mammalia)

Published in Opinions and declarations of rendered by the International Commission of Zoological Nomenclature, in 1957, in volume 15, pages 457-474

Opinion 436 Addition to the Official Indexes of Rejected and invalid names in Zoology of certain names attributed to Renier (S. A.) as from 1804 and 1807 respectively (Opinion supplementary to Opinion 427)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 1, pages 1-24

Opinion 437 Validation under the Plenary Powers of the generic name Pachyceras Bayle, 1878 (class Cephalopoda, order Ammonoidea) by the suppression of the name Pachyceras Ratzeburg, 1844 (class Insecta, order Hymenoptera)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 2, pages 25-40

Opinion 438 Validation under the Plenary Powers of the generic name Rhinopteraspis Jaekel, 1919 (class Ostracodermi)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 3, pages 41-50

Opinion 439 Designation under the Plenary Powers of a type species in harmony with accustomed usage for the genus Anurophorus Nicolet, [1842] (class Insecta, order Collembola)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 4, pages 51-66

Opinion 440 Validation under the Plenary Powers of the generic name Entomobrya Rondani, 1861 (class Insecta, order Collembola)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 5, pages 67-82

Opinion 441 Validation under the Plenary Powers of the names for five genera in the order Diptera (class Insecta) published in 1762 by Geoffroy (E.l.) in the work entitled Histoire Abregee des Insectes Qui Se Trouvent Aux Environs de Paris (Opinion supplementary to Opinion 228)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 6, pages 83-120

Opinion 442 Validation under the Plenary Powers of the generic name Stratiomys Geoffroy, 1762 (class Insecta, order Diptera)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 7, pages 121-162

Opinion 443 Designation under the Plenary Powers of a type species in harmony with accustomed usage for the genus Monticulipora d'Orbigny, October 1849 (class Bryozoa) (Ordovician)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 8, pages 163-174

Opinion 444 Validation under the Plenary Powers of the specific name obscura Berezowsky & Bianchi, 1891, as published in the combination Larvivora obscura (class Aves)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 9, pages 175-190

Opinion 445 Rejection for nomenclatorial purposes of the work by Eberhard (J. P.) entitled Versuch Eines Neuen Entwurfs der Thiergeschichte published in 1768

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 10, pages 191-198

Opinion 447 Rejection for nomenclatorial purposes of the original Edition published At Philadelphia in 1791 and of the editions published in London and Dublin respectively in 1792 of the work by William Bartram entitled "travels Through North and South Carolina, Georgia, East and West Florida, the Cherokee Country, the Extensive Territories of the Muscogulges or Creek Confederacy, and the Country of the Chactaws", as being a work in which the author Did not apply the principles of Binominal nomenclature

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 12, pages 211-224

Opinion 448 Suppression under the Plenary Powers of the name Bei Ridgway, 1874, as published in the combination Eremophila alpestris var. Bei, a name given to the Astrakan Horned Lark as the Result of the Misreading . of a Museum Label (class Aves)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 13, pages 225-234

Opinion 449 Determination of the species to be accepted as the type species of the nominal genus Laqueus Dall, 1870 (class Brachiopoda)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 14, pages 235-250

Opinion 450 Suppression under the Plenary Powers of the generic name Phalaena Linnaeus, 1758, and validation as of subgeneric status (a) as from 1758, of the Terms Bombyx, Noctua, Geometra, Tortrix, Pyralis, Tinea, and Alucita as used by Linnaeus for Groups of species of the genus Phalaena and (B) as from 1767 of the Term Attacus similarly published by Linnaeus and matters incidental thereto (class Insecta, order Lepidoptera)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 15, pages 251-328

Direction 59 Determination (a) of the method to be Followed in Citing for the Purposes of Zoological nomenclature the Several portions in which the Lepidotteri volume by Orenzio Gabriele Costa of the work entitled Fauna Del Regno Di Napoli Were published, and (B) of the Dates which for the foregoing Purposes are to be assigned to each of those portions

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 16, pages 2-19

Opinion 451 Use of the Plenary Powers to secure that the specific name dingo Meyer, 1793, as published in the combination Canis dingo, shall be the oldest available name for the Dingo of Australia (class Mammalia)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 17, pages 329-338

Opinion 452 Addition to Tlie Official List of Specific Names in Zoology of the specific name australis Kerr, 1792, as published in the combination Canis australis, as the oldest available name for the Falkland Islands Wolf (class Mammalia)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 18, pages 339-346

Opinion 453 Validation under the Plenary Powers of the generic name Bombina Oken, 1816 (class Amphibia, order Anura)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 19, pages 347-356

Opinion 454 Designation under the Plenary Powers of a type species in harmony with accustomed usage for Scolopendm Linnaeus, 1758 (class Chilopoda)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 20, pages 357-378

Opinion 456 Rejection of the work by Thomas Martyn published in 1784 with the title the Universal Conchologist as a work which Does not Comply with the Requirements of Article 25 of the Regies and which Therefore Possesses No status in Zoological nomenclature and rejection Also of a proposal that the foregoing work Should be validated under the Plenary Powers

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 22, pages 393-418

Opinion 457 Validation under the Plenary Powers of the generic name Hemiprocne Nitzsch, 1829 (class Aves)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 23, pages 419-432

Opinion 458 Determination of the interpretation of the nominal species Eschara vulgaris Moll, 1803 (class Ectoprocta)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 24, pages 433-442

Opinion 459 Validation under the Plenary Powers of the generic name Fistuupora M^coy, 1849 (class Bryozoa)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 25, pages 443-454

Opinion 460 Validation under the Plenary Powers of the generic name Muntiacus Rafinesque, 1815, and designation for the genus so named of a type species in harmony with accustomed usage (class Mammalia)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 26, pages 455-474

Opinion 461 Addition to the Official List of Generic Names in Zoology of the generic name Cubiceps Lowe (R. T.), 1843, a name published Conditionally for a species Described simultaneously in the genus Seriola Cuvier (G. L. C. F. D.), [1816] (class Pisces) (Opinion supplementary to Declaration 30)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 15, issue 28, pages 475-484

Opinion 465 Validation under the Plenary Powers of the specific name "silvestris" Schreber [1777] as published in the combination "felis (Catus) Silvestris", for the European Wild Cat (class Mammalia)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, pages 43-52

Opinion 466. Validation under the plenary powers of the generic name "Phacochoerus" Cuvier (F.), 1826, as the generic name for the Wart Hog (Class Mammalia)

Published in Opinions and Declarations Rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, pages 55-72

Opinion 463 Designation under the Plenary Powers of a type species in harmony with accustomed usage for the genus Oxypoda Mannerheim, 1831 (class Insecta, order Coleoptera)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, issue 2, pages 13-24

Opinion 464 Action under the Plenary Powers to secure (a) that the specific name gambianus Ogilby, 1835, as published in the combination Sciurus gambianus shall be the oldest available name for the Sun Squirrel and (B) that the generic name Heliosciurus Trouessart, 1880, shall be the oldest available generic name for that species (class Mammalia)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, issue 3, pages 25-42

Opinion 466 Validation under the Plenary Powers of the generic name Phacochoerus Cuvier (F.), 1826, as the generic name for the Wart Hog (class Mammalia)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, issue 5, pages 53-72

Opinion 467 Validation under the Plenary Powers of the generic name Odobenus Brisson, 1762, as the generic name for the Walrus (class Mammalia)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, issue 6, pages 73-88

Opinion 469 Rejection (a) of the generic name Jumala Friele, 1882, as a name calculated to give offence on religious Grounds, and (B) of the name Beringius Dall, 1879, as not having been duly published (class Gastropoda)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, issue 8, pages 97-128

Opinion 470 Addition to the Official List of Generic Names in Zoology of the names of one hundred and two genera of Caridea (class Crustacea, order Decapoda) and the use of the Plenary Powers for various purposes in connection therewith

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, issue 9, pages 129-202

Opinion 471 Validation under the Plenary Powers of the family group name Mayaitidae Spath (L. F.), 1928 (class Cephalopoda, order Ammonoidea)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, issue 12, pages 203-212

Opinion 472 Addition to the Ojficial List of Generic Names in Zoology of the generic name Pagurus Fabricius, 1775, with Cancer bernhardus Linnaeus, 1758, as type species (class Crustacea, order Decapoda)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, issue 13, pages 213-276

Opinion 473 Determination of the species to be accepted as the type species of the genus Inoceramus Sowerby (J.), 1814 (class Pelecypoda) and addition of that name to the Official List of Generic Names in Zoology

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, issue 15, pages 277-296

Opinion 474 Determination of the Dates to be assigned for the purposes of the Law of priority to the names published in Dru Drury's Illustrations of Natural History in the period 17701782

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, issue 16, pages 297-306

Opinion 475 Validation under Tlie Plenary Powers of the generic name Bithynia Leach, 1818 (class Gastropoda) and matters associated therewith

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, issue 17, pages 307-330

Opinion 476 Validation under the Plenary Powers of the generic name Phillipsinella Novak, 1886 (class Trilobita)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, issue 18, pages 331-342

Direction 70 Validation under the Plenary Powers of the family-group name Arieticeratinae Howarth, 1955 (class Cephalopoda, order Ammonoidea) (Direction supplementary to Opinion 337)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, issue 19, pages i-xii

Opinion 477 Validation under the Plenary Powers of the generic name Cerebratulus [Renier], [1804], and of the specific name marginatus [Renier], [1804], as used by the foregoing author in the combination Cerebratulus marginatus (class Nemertea) (Opinion supplementary to Opinion 427)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, issue 20, pages 343-352

Opinion 478 Validation under the Plenary Powers of the generic name Polycitor [Renier], [1804], and of the specific name crystallinus [Renier], [1804], as used by the foregoing author in the combination Polycitor crystallinus (class Urochorda) (Opinion supplementary to Opinion 421)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, issue 21, pages 353-364

Opinion 479 Validation under the Plenary Powers of Specific Names for Nine species of the class Gastropoda Occurring in the New Zealand Area as published by Martyn (T.) in 1784 in the work entitled the Universal Conchologist (Opinion supplementary to Opinion 456)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, issue 22, pages 365-416

Opinion 480 Suppression under the Plenary Powers of the specific and Subspecific names of birds published in the so-Called "horniman pamphlet" dated "1940" and matters incidental thereto

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, issue 23, pages 417-454

Direction 79 Substitution on the Official List of Specific Names in Zoology of the specific name brasiliensis Gmelin (J. F.), 1788, as published in the combination Mustela Lutris var. Brasiliensis, for the specific name Sambachii Gray (J. E.), 1837, as published in the combination Pteronura Sambachii (class Mammalia) (Direction supplementary to Opinion 384)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 16, issue 24, pages 455-464

Opinion 484 Addition to the Official List of Generic Names in Zoology and to the Official List of Family-group Names in Zoology respectively of the generic name Chama Linnaeus, 1758, and the family-group name Chamidae (correction of Camacea) Blainville, 1825 (class Pelecypoda)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 17, pages 73-86

Opinion 481 Emendation under the Plenary Powers to Lernaeocera of the generic name Lerneocera and designation under the same Powers of a type species in harmony with accustomed usage for the genus so named (class Crustacea, order Copepoda)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 17, issue 1, pages 1-14

Opinion 482 Rejection of a proposal for the suppression under the Plenary Powers of the generic name Caenisites Buckman, 1925 (class Cephalopoda, order Ammonoidea)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 17, issue 3, pages 15-40

Opinion 483 Determination of the specimen to be accepted as the lectotype of the nominal species Megathymus aryxna Dyar, 1905 (class Insecta, order Lepidoptera) and matters incidental thereto

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 17, issue 5, pages 41-72

Opinion 485 Determination of the Relative priority to be assigned to the names Cheirodon Axelrodi Schultz (L. P.) and Hyphessobrycon Cardinalis Myers (G. S.) & Weitzman (S. H.) (class Pisces), both being names published in February 1956

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 17, issue 7, pages 87-104

Opinion 486 Validation under the Plenary Powers as from Morris (1845) of the specific name brachythaerus, as published in the combination Productus brachythaerus and designation under the same Powers of the species so named to be the type species of the genus Terrakea Booker, 1930 (class Brachiopoda)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 17, issue 8, pages 105-118

Opinion 487 Validation under the Plenary Powers of the generic names Gempylus Cuvier, 1829 (class Pisces) and Acinaces Gerstaecker, 1858 (class Insecta, order Coleoptera)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 17, issue 9, pages 119-142

Opinion 488 Determination of the status under Rule (G) in Article 30 of the Règles of the action taken by Curtis (J.) in the Second Edition of the work entitled a Guide to an Arrangement of British Insects published in 1837

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 17, issue 10, pages 143-154

Opinion 489 Validation under the Plenary Powers of the generic name Turbinella Lamarck, 1799 (class Gastropoda), as the name for the Sacred Chank Shell of India

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 17, issue 11, pages 155-178

Opinion 490 Action under the Plenary Powers to Preserve for use in its accustomed sense the generic name Elaphe Fitzinger, 1833 (class Reptilia)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 17, issue 12, pages 179-196

Opinion 491 Interpretation under the Plenary Powers of the nominal species Palaeopsylla daea Dampf, 1910 (class Insecta, order Siphonaptera) for the purpose of validating accustomed usage

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 17, issue 13, pages 197-208

Opinion 492 Suppression under the Plenary Powers of the family group name Aucellidae Lanusen, 1897, and rejection of an application for use of the same Powers to validate the generic name Aucella Keyserling, 1846, by Suppressing the generic name Buchia Rouillier, 1845 (class Lamellibranchiata)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 17, issue 14, pages 209-254

Opinion 493 Designation under the Plenary Powers of a type species in harmony with Estabhshed usage for the genus Torquesia Douville, 1929 (class Gastropoda)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 17, issue 15, pages 255-264

Opinion 494 Validation under the Plenary Powers of the generic name Diloba Boisduval, 1840, and designation under the same Powers of a type species in harmony with Established usage for the genus Episema Ochsenheimer, 1816 (class Insecta, order Lepidoptera)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 17, issue 16, pages 265-286

Opinion 495 Designation., under the Plenary Powers of a type species in harmony with accustomed usage for the nominal genus Unio Philipsson, 1788 (class Pelecypoda) and validation under the same Powers of the family-group name Margaritiferidae Haas, 1940

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 17, issue 17, pages 287-322

Opinion 496 Use of the Plenary Powers to secure the continued use in their accustomed sense of the generic names Olenus Dalman, [1827], and Paradoxides Brongniart, 1822 (class Trilobita)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 17, issue 18, pages 323-348

Opinion 497 Suppression under the Plenary Powers of the specific name munda Kuhl, 1820, as published in the combination Proc.[Ellaria] Munda and on the same Occasion in the combination Nectris munda (class Aves)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 17, issue 19, pages 349-360

Opinion 498 Validation under the Plenary Powers of the specific name tuberculatus, as published by Hall (J. W.) in 1859 in the combination Acidaspis tuberculatus, and use of the same Powers to provide an assured basis for the use of the generic name Leonaspis Richter (R.) & Richter (E.), 1917 (class Trilobita)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 17, issue 20, pages 361-376

Direction 60 Designation under the Plenary Powers of a type species for the genus Scorpio Linnaeus, 1758 (class Arachnida) in harmony with accustomed usage and suppression under the same Powers of the specific name europaeus Linnaeus, 1758, as published in the combination Scorpio Europaeus (amendment of a ruling given in Opinion 104)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, pages 1

Direction 63 Completion and in certain Cases correction of entries relating to the names of genera belonging to the class Insecta made in the Official List of Generic Names in Zoology in the period up to the end of 1936

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, pages 21-60

Direction 64 Addition to the Official List of Specific Names in Zoology (a) of the specific names of nineteen species belonging to the class Insecta, each of which is the type species of a genus, the name of which was placed on the Official List of Generic Names in Zoology in the period up to the end of 1936 and (B) of the specific names of three species belonging to the same class which are currently treated as senior Subjective synonyms of the names of such species

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, pages 61-74

Direction 65 Determination of the Form to be adopted for the name of the Xviiith Century Viennese Medical Practitioner Commonly known as " Laurenti "

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, pages 75-84

Direction 66 Completion and in certain Cases correction of entries relating to the names of genera belonging to the Phylum Arthropoda, the names of which Were placed on the Official List of Generic Names in Zoology in the period up to the end of 1936, other than entries relating to the names of genera belonging to the class Insecta and to the order Decapoda of the class Crustacea

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, pages 85-110

Direction 67 Addition to the Official List of Specific Names in Zoology (a) of the specific names of Twenty species belonging to the classes Trilobita, Crustacea (other than species of the order Decapoda), Diplopoda and Arachnida, each of which is the type species of a genus, the name of which was placed on the Official List of Generic Names in Zoology up to the end of 1936, and (B) of the specific name of one species belonging to the class Arachnida which is currently treated as a senior synonym of the name of such a species

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, pages 111-128

Direction 72 Completion and in certain Cases correction of entries relating to the names of genera of the Phyla Mollusca, Brachiopoda, Echinodermata and Chordata made on the Official List of Generic Names in Zoology by rulings given in Opinions rendered in the period up to the end of 1936

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, pages 161-192

Direction 73 Addition to the Official List of Specific Names in Zoology (a) of the specific names of Twenty-five species of the Phyla Mollusca, Brachiopoda, Echinodermata and Chordata, each of which is the type species of a genus, the name of which was placed on the Official List of Generic Names in Zoology in the period up to the end of 1936 and (B) of the specific names of three species belonging respectively to the Phyla Brachiopoda, Echino Dermata and Chordata, each of which is currently treated by Some or All Specialists as a senior Subjective synonym of the name of such a species

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, pages 193-214

Direction 74 Completion, and in Part, correction of certain entries relating to the names of genera of birds made on the Official List of Generic Names in Zoology by the ruling given in Opinion 67 and matters incidental thereto

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, pages 215-226

Direction 76 Completion and in certain Cases correction of entries relating to the names of genera belonging to the Phyla Protozoa, Coelenterata, Platyhelminthes, Nemathelminthes and Annelida, made on the Official List of Generic Names in Zoology by rulings given in Opinions rendered in the period up to the end of 1936

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, pages 227-264

Direction 77 Addition to the Official List of Specific Names in Zoology (a) of the specific names of Thirty-four species belonging to the Phyla Protozoa, Coelenterata, Platyhelminthes, Nemathelminthes, and Annelida, each of which is the type species of a genus, the name of which was placed on the Official List of Generic Names in Zoology in the period up to the end of 1936 and (B) of five specific names which are currently treated as senior Subjective synonyms of the names of such species

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, pages 265-292

Direction 80 Confirmation of Tlie entry on the Official List of Generic Names in Zoology relating to the generic name Molgula Forbes, 1848 (class Urochorda) {Direction Supple Mentary to Opinion 94)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, pages 305-314

Direction 81 Confirmation of the Position on the Official List of Generic Names in Zoology of the generic names Gypaetus Storr, 1784, Anas Linnaeus, 1758, Nyctea Stephens, 1826, and Vireo Vieillot, 1807 (class Aves) and correction of the entries made in Regard thereto (Direction supplementary to Opinion 67)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, pages 315-334

Direction 82 Confirmation of the Position on the Official List of Generic Names in Zoology of the generic name Trichoglossus Stephens, 1826 (class Aves), Subject to the Substitution of an amended entry in Regard thereto {Direction supplementary to Opinion 67)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, pages 335-360

Direction 84 Designation under the Plenary Powers of a neotype for the nominal species Cancer depurator Linnaeus, 1758, (class Crustacea, order Decapoda) {Direction Supple Mentary to Opinion 73 and Direction 36)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, pages 371-388

Direction 85 Determination of the Dates to be attributed to the Several portions of the Crustacea volume written by de Haan (W.) in the work by P. F. Von Siebold entitled Fauna Japonica

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, pages 389-402

Direction 69 Validation under the Plenary Powers of the generic name Osmerus as of subgeneric status as from Linnaeus, 1758 (class Pisces) (validation of an error in the ruling given in Opinion 11)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, issue E9, pages 137-150

Direction 61 Determination under the Plenary Powers of the gender to be attributed to the generic name Varuna Milne Edwards (H.), 1830 (class Crustacea, order Decapoda) (Supplement to Opinion 85)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, issue E.2, pages 13-20

Direction 68 Addition to the Official List of Generic Names in Zoology of the generic name Pelecanus Linnaeus, 1758 (class Aves) (Direction supplementary to Opinion 16)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, issue E.8, pages 129-136

Direction 71 Determination under the Plenary Powers of the gender to be attributed to the generic name Lepisma Linnaeus, 1758 (class Insecta, order Thysanura) (Direction supplementary to Opinion 104)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, issue E.10, pages 151-160

Direction 78 Validation under the Plenary Powers of the generic name Daira de Haan, [1833] (class Crustacea, order Decapoda) (validation of an entry on the Ojficial List of Generic Names in Zoology made by the ruling given in Opinion 73)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, issue E.16, pages 293-304

Direction 83 Suppression under the Plenary Powers of the specific name ferox Gmelin (S. G.), 1771, as published in the combination Accipiter Ferox (class Aves) (Direction supplementary to Opinion 67)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, issue E.20, pages 361-370

Direction 86 Validation under the Plenary Powers of the specific name convexa de Haan, [1833], as published in the combination Ocypode (Chasmagnathus) Convexa (class Crustacea, order Decapoda) (Direction supplementary to Opinion 85)

Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1957, in volume 1E, issue E.23, pages 403-412