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New and Unfigured Unionidæ
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1900, in volume 52, pages 74-86
February 13
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1900, in volume 52, pages 87
March 20
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1900, in volume 52, pages 339
The Raubsville Cave
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1900, in volume 52, pages 464
November 20
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1900, in volume 52, pages 684
Notes on Chiroptera
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1900, in volume 52, pages 755-759
Council for 1901
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1900, in volume 52, pages 779
A new species of Thersites
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1900, in volume 1899, pages 473-474