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February 28
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1893, in volume 45, pages 66-67
April 25
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1893, in volume 45, pages 201
May 2
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1893, in volume 45, pages 218
May 30
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1893, in volume 45, pages 226
July 25
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1893, in volume 45, pages 288
October 31
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1893, in volume 45, pages 362-363
November 7
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1893, in volume 45, pages 401
Report of the Librarian
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1893, in volume 45, pages 556-558
New North American Myxomycetes
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1893, in volume 45, issue 3, pages 364-372