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January 21

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 15-17

Materials for the study of the Phytophaga

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 19-83

February 11

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 99-100

March 4

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 205-206

March 11

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 206

March 18

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 207-208

Description of a New Species of Goniodoris

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 232

On the Lingual Dentition and Jaw of Certain Terrestrial Pulmonata from the United States, with Remarks on Their Systematic Value

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 240-256

Observations on Change in Structure of a Larva of Dryocampa imperialis

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 274-275

Influence of Nutrition on Sex among the Lepidoptera

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 281-283

May 1, 1873

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 285-286

Descriptions of new species of Orthoptera collected in Nevada, Utah and Arizona by the expedition under Lt. G. M. Wheeler

Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1873, in volume 25, pages 295-297

Synonymical remarks upon North American Coleoptera

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 321-336

On a new American species of pleuronectoid (Glyptocephalus acadianus)

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 360-362

October 7

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 363-364

October 14

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 364-366

November 18

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 370-371

November 25

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 372-373

December 2

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 414

Description of Seven New Species of Unionidæ of the United States

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 422-423

Notes on the Genus Conchiopsis, Cope

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 425-426

The Librarian's Report

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 428-429

Report of Recorder of Biological and Microscopical Section

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 432-434

Report of Conservator of Conchological Section

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 434-437

Correspondence of the Academy. For 1873

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1873, in volume 25, pages 439-442

Catalogue of the recent species of the class Brachiopoda

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1873, in volume 1873, pages 177-204