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Published in Proceedings of the Biological Society of Washington, in 1918, in volume 31, pages 9-14

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Published in Proc. Biol. Soc. Wash., in 1918, in volume 31, pages 15-20

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 21-25

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 27-29

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 31-32

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 33-34

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 35-36

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 37-38

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 39-40

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Published in Proceedings of the Biological Society of Washington, in 1918, in volume 31, pages 41-44

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 45-46

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 51-57

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 61-63

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Published in Proc. Biol. Soc. Wash, in 1918, in volume 31, pages 65-68

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 69-74

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 75-77

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 79-80

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 81-82

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 83-84

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Published in Proceedings of the Biological Society of Washington, in 1918, in volume 31, pages 85-87

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Published in Proc. Biol. Soc. Washington, in 1918, in volume 31, pages 89-92

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 93

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 95-96

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 97

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Published in Proc. Biol. Soc. Wash., in 1918, in volume 31, pages 99

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 101-103

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 105-106

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 107-108

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 109-123

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 125-126

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 127-129

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 131-134

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 135-136

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 137-138

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 139-151

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 153-154

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 155-159

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 161-163

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 165-170

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 171-172

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Published in Proceedings of the Biological Society of Washington, in 1918, in volume 31, pages 173-180

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 181-187

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 189-196

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 197-198

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 199-201

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Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 203-204

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