Published in Proceedings of The Biological Society of Washington, in 1902, in volume 15, pages 1-9

Published in Proceedings of The Biological Society of Washington, in 1902, in volume 15, pages 11-13

Published in Proc. Biol. Soc. Wash., in 1902, in volume 15, pages 15-17

Published in Proceedings of The Biological Society of Washington, in 1902, in volume 15, pages 19-21

Published in Proceedings of The Biological Society of Washington, in 1902, in volume 15, pages 23-29

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Published in Proc. Biol. Soc, Washington, in 1902, in volume 15, pages 37-38

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Published in Proceedings of The Biological Society of Washington, in 1902, in volume 15, pages 41-50

Published in Proceedings of The Biological Society of Washington, in 1902, in volume 15, pages 51-52

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Published in Proceedings of The Biological Society of Washington, in 1902, in volume 15, pages 59-66

Published in Proceedings of The Biological Society of Washington, in 1902, in volume 15, pages 67-69

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Published in Proceedings of The Biological Society of Washington, in 1902, in volume 15, pages 81-82

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Published in Proc. biol. Soc. Washington, in 1902, in volume 15, pages 85

Published in Proceedings of The Biological Society of Washington, in 1902, in volume 15, pages 87-88

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Published in Proceedings of the Biological Society of Washington, in 1902, in volume 15, pages 101-116

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Published in Proceedings of The Biological Society of Washington, in 1902, in volume 15, pages 121-145

Published in Proceedings of The Biological Society of Washington, in 1902, in volume 15, pages 147-149

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Published in Proceedings of The Biological Society of Washington, in 1902, in volume 15, pages 167-172

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Published in Proceedings of The Biological Society of Washington, in 1902, in volume 15, pages 183-186

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Published in Proceedings of The Biological Society of Washington, in 1902, in volume 15, pages 213-234

Published in Proc. Biol. Soc. Washington, in 1902, in volume 15, pages 235-238

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Published in Proceedings of the Biological Society of Washington, in 1902, in volume 15, pages 245-246