362 Bulletin of Zoological Nomenclature
PROPOSED USE OF THE PLENARY POWERS TO VALIDATE THE
SPECIFIC NAME " CONVEXA" DE HAAN, [1835], AS PUBLISHED
IN THE COMBINATION " OCYPODE (CHASMAGNATHUS) CON-
VEXA", THE NAME OF THE TYPE SPECIES OF THE GENUS
"CHASMAGNATHUS" DE HAAN, [1835] (CLASS CRUSTACEA,
ORDER DECAPODA), PLACED ON THE "OFFICIAL UST OF
GENERIC NAMES IN ZOOLOGY" BY THE RULING GIVEN IN
" OPINION " 85
By FRANCIS HEMMING, C.M.G., C.B.E.
(Secretary to the International Commission on Zoological Nomenclature)
(Commission Reference : Z.N.(S.) 984)
The purpose of the present application is to ask the International Commission
on Zoological Nomenclature to use its Plenary Powers to validate the specific
name currently used for the type species of the genus Ghasmagnathus de Haan,
[1835] (Class Crustacea, Order Decapoda), which was placed on the Official
List of Generic Names in Zoology by the Ruling given in Opinion 85 (1925,
Smithson. misc. Goll. 74(No. 3) : 13-18).
2. The existence of the present problem came to light in the early part of
1955 when proposals were being formulated for submission to the International
Commission for the addition to the Official List of Specific Names in Zoology
of the specific names of the type species of the genera of Decapoda, the names
of which had been placed on the Official List of Generic Names in Zoology
in the pre-Lisbon (1935) period. The facts of this case are set out in the follow-
ing paragraphs.
3. The name Ghasmagnathus was introduced by de Haan in the Crustacea
Section of von Siebold's Fauna japonica for use as the name of a subgenus
of Ocypode Fabricius, 1798. This name occurs twice in the Crustacea Section,
first on page 5 and later on page 27. These pages were pubhshed in Parts 1 and 2
respectively, the first appearing in 1833, the second in 1835. On page 5 the
name Ghasmagnathus was given only in a key without any cited nominal
species ; on page 27 the subgenus was more fully diagnosed and one species,
the new species Ocypode (Ghasmagnathus) convexa, was cited as belonging to it.
This species is therefore the type species of Ghasmagnathus de Haan by
monotypy.
Bull. zool. Nomend. Vol. 11, Part 12. November 1956.
Proposed use of the Plenary Powers to validate the use of the specific name convexa de Haan, [1835], as published in the combina-tion Ocypode (Chasmagnathus) convexa, the name of the type species of the genus Chasmagnathus de Haan, [1835] (Class Crustace
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