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On a blind silurid, from Pennsylvania

Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1864, in volume 16, pages 231-233

On the characters of the higher groups of Reptilia Squamata—and especially of the Diploglossa

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1864, in volume 16, pages 224-231

Contributions to the herpetology of tropical America

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1864, in volume 16, pages 166-181

Critical remarks on the genera Sebastes and Sebastodes of Ayres

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 145-147

Note on the paralepidoids and microstomatoids, and on some peculiarities of Arctic ichthyology

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 187-189

On the limits and relations of the Raniformes

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1864, in volume 1864, pages 181-183

Descriptions on new species of marine Invertebrata from Puget Sound, collected by the naturalists of the North-west Boundary Commission, A.H. Campbell, Esq., Commissioner

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 153-161

January 12th

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 1-2

Notes on Some Species of Birds from South America

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 286-288

March 1st

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 49

Report of the Recording Secretary, for 1864

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 288

June 14th

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 152

Remarks upon a Proposed Arrangement of the Family of Grouse, and New Genera Added

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 23

Synopsis of the Pleuronectoids of the Eastern Coast of North America

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 214-224

Synonymy of the Species of Strepomatidæ, a Family of Fluviatile Mollusca Inhabiting North America. Part 3

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 92-104

Notes of an Examination of the Birds of the Subfamily Coerebinæ

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 265-275

New Species of Mordellistena Collected in Illinois

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 105

Synopsis of the Cyclopteroids of Eastern North America

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 189-194

On the Affinities of Several Doubtful British Fishes

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 199-208

Dec. 6th

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 275

Descriptions of Eleven New Species of Indigenous Melanidæ

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 3-5

Dec. 20th

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 276

The Influence of the Earth's Atmosphere on the Color of the Stars

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 161-165

Second Contribution to the Selachology of California

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 147-151

Descriptions of New Species of North American Polydesmidæ

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 6-10

Descriptions of six new species of Unionidae from Lake Nyassa, Central Africa, andc

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1864, in volume 16, pages 108-109