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Descriptions of new species of the reptilian genera Hyperolius, Liuperus and Tropidodipsas

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1861, in volume 12, pages 517-518

Descriptions of two new species of Pimelodus from Kansas

Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1861, in volume 12, pages 568-569

January 1st, 1861

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1861, in volume 13, pages 1

January 15th

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1861, in volume 13, pages 2

February 12th

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1861, in volume 13, pages 21-24

Synopsis of the subfamily of Percinae

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1861, in volume 13, pages 44-52

March 12th

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1861, in volume 13, pages 56

April 2d

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1861, in volume 13, pages 73-75

On the Haploidonotinae

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1861, in volume 13, pages 100-105

Descriptions of new species of Cyrena, Corbicula and Sphaerium

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1861, in volume 13, pages 125-128

On three new forms of rattlesnakes

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1861, in volume 13, pages 206-207

Notes and descriptions of anoles

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1861, in volume 13, pages 208-215

Monograph of the tridigitate uranoscopoids

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1861, in volume 13, pages 263-271

Rectfication of the paper upon the Hemiptera of the North Pacific Expedition

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1861, in volume 13, pages 286-287

Contributions to the ophiology of Lower California, Mexico and Central America

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1861, in volume 13, pages 292-306

Oct. 8th

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1861, in volume 13, pages 311

On the Reptilia of Sombrero and Bermuda

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1861, in volume 13, pages 312-314

Nov. 19th

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1861, in volume 13, pages 334

Notes on the Coleopterous Fauna of Lower California

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1861, in volume 13, pages 335-338

New species of COLEOPTERA inhabiting the Pacific district of the United States

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1861, in volume 13, pages 338-359

Report upon the Reptilia of the North Pacific Exploring Expedition, under command of Capt. John Rogers, U. S. N

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1861, in volume 1860, pages 480-510

Recent species of Emydosaurian reptiles represented in the Museum of the Academy

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1861, in volume 1860, pages 549-551

Some remarks defining the following species of Reptilia Squamata

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1861, in volume 1861, pages 75-76

Description of new pteropine bats from Africa

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1861, in volume 1861, pages 156-160

Notes on the Ornithology of Labrador

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1861, in volume 1861, pages 215-257

Description of nine new North American Limnobiaceae

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1861, in volume 1861, pages 287-292