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A review of the species of the Amblystomidae

Authors: E D Cope

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1868, in volume 19, pages 166-211

Created: 2010-06-27, modified: 2021-04-05

Jan. 7th, 1868

Authors:

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 1

Created: 2013-03-02, modified: 2013-03-02

A Monograph of the Alcidæ

Authors: Elliott Coues

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 2-81

Created: 2013-03-02, modified: 2013-03-02

Feb. 4th

Authors:

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 85-86

Created: 2013-03-02, modified: 2013-03-02

Descriptions of Some New Species of Diurnal Lepidoptera. Series III

Authors:

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 87-91

Created: 2013-03-02, modified: 2013-03-02

March 10th

Authors:

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 91

Created: 2013-03-02, modified: 2013-03-02

An examination of the Reptilia and Batrachia obtained by the Orton Expedition to Equador and the Upper Amazon, with notes on other species

Authors: E D Cope

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1868, in volume 20, pages 96-140

Created: 2010-03-21, modified: 2021-04-05

Second supplement on some new Raniformia of the old World

Authors: E D Cope

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1868, in volume 20, pages 138-139

Created: 2010-02-03, modified: 2021-04-05

Notes on Some Singular Forms of Chinese Species of Unio

Authors: Isaac Lea

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 145-146

Created: 2013-03-02, modified: 2013-03-02

Variations in Epigæa repens

Authors: Thomas Meehan

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 153-156

Created: 2013-03-02, modified: 2013-03-02

Monœcism in Luzula campestris

Authors: Thomas Meehan

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 156

Created: 2013-03-02, modified: 2013-03-02

June 9th

Authors:

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 159

Created: 2013-03-02, modified: 2013-03-02

Descriptions of Seven New Species of Unio from North Carolina

Authors: Isaac Lea

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 160-161

Created: 2013-03-02, modified: 2013-03-02

Indication of an Elotherium in California

Authors: Joseph Leidy

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 177

Created: 2013-03-02, modified: 2013-03-02

Notice of Some Vertebrate Remains from the West Indian Islands

Authors: Joseph Leidy

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 178-180

Created: 2013-03-02, modified: 2013-03-02

July 21st

Authors:

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 182-183

Created: 2013-03-02, modified: 2018-04-12

Notice of Some Extinct Cetaceans

Authors: Joseph Leidy

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 196-197

Created: 2013-03-02, modified: 2013-03-02

Notice of American Species of Ptychodus

Authors: Joseph Leidy

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 205-208

Created: 2013-03-02, modified: 2013-03-02

Synopsis of the Extinct Batrachia of North America

Authors: Edward D Cope

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 208-221

Created: 2013-03-02, modified: 2013-03-02

On Agaphelus, a Genus of Toothless Cetacea

Authors:

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 221-227

Created: 2013-03-02, modified: 2013-03-02

Oct. 20th

Authors:

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 227-228

Created: 2013-03-02, modified: 2013-03-02

Notice of Some American Leeches

Authors: Joseph Leidy

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 229-230

Created: 2013-03-02, modified: 2013-03-02

Sixth Contribution to the Herpetology of Tropical America

Authors: Edward D Cope

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 305-313

Created: 2010-01-08, modified: 2021-04-05

Dec. 1st

Authors:

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 313-314

Created: 2013-03-02, modified: 2013-03-02

Dec. 22d

Authors:

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 314-315

Created: 2013-03-02, modified: 2013-03-02

Notice of Some Remains of Extinct Insectivora from Dakota

Authors: Joseph Leidy

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 315-316

Created: 2013-03-02, modified: 2013-03-02

On the Seed Vessels of Forsythia

Authors: Thomas Meehan

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 334

Created: 2013-03-02, modified: 2013-03-02

Description of Seven New Species of American Birds from Various Localities, with a Note on Zonotrichia melanotis

Authors:

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 359-430

Created: 2013-03-02, modified: 2013-03-02

Notes on the Species of Agonoderus, Bradycellus and Stenolophus Inhabiting America North of Mexico

Authors: John L Le Conte

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 373-382

Created: 2013-03-02, modified: 2013-03-02

Correspondence of the Academy for 1868

Authors:

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 394-396

Created: 2013-03-02, modified: 2013-03-02

Donations to the Library, 1868

Authors:

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1868, in volume 20, pages 400-419

Created: 2013-03-02, modified: 2013-03-02