Published in Proceedings of The Biological Society of Washington, in 1941, in volume 54, pages 1-13

Published in Proceedings of The Biological Society of Washington, in 1941, in volume 54, pages 15-16

Published in Proceedings of The Biological Society of Washington, in 1941, in volume 54, pages 17-21

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Published in Proceedings of the Biological Society of Washington, in 1941, in volume 54, pages 25-30

Published in Proceedings of The Biological Society of Washington, in 1941, in volume 54, pages 31-34

Published in Proceedings of The Biological Society of Washington, in 1941, in volume 54, pages 35-42

Published in Proceedings of The Biological Society of Washington, in 1941, in volume 54, pages 43-5

Published in Proc. Biol. Soc. Washington, in 1941, in volume 54, pages 47-48

Published in Proceedings of The Biological Society of Washington, in 1941, in volume 54, pages 49-50

Published in Proceedings of The Biological Society of Washington, in 1941, in volume 54, pages 51-53

Published in Proceedings of The Biological Society of Washington, in 1941, in volume 54, pages 55-61

Published in Proceedings of The Biological Society of Washington, in 1941, in volume 54, pages 63-66

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Published in Proceedings of The Biological Society of Washington, in 1941, in volume 54, pages 69-71

Published in Proc. Biol. Soc. Washington, in 1941, in volume 54, pages 73-76

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Published in Proceedings of The Biological Society of Washington, in 1941, in volume 54, pages 81-85

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Published in Proceedings of The Biological Society of Washington, in 1941, in volume 54, pages 95-107

Published in Proceedings of The Biological Society of Washington, in 1941, in volume 54, pages 109-113

Published in Proceedings of The Biological Society of Washington, in 1941, in volume 54, pages 115-117

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Published in Proceedings of The Biological Society of Washington, in 1941, in volume 54, pages 151-159

Published in Proceedings of The Biological Society of Washington, in 1941, in volume 54, pages 161-164

Published in Proc. Biol. Soc. Wash, in 1941, in volume 54, pages 165-168

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Published in Proceedings of The Biological Society of Washington, in 1941, in volume 54, pages 211-216