Published in Proceedings of the Biological Society of Washington, in 1957, in volume 70, pages 1-8

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Published in Proceedings of the Biological Society of Washington, in 1957, in volume 70, pages 9-16

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 17-19

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Published in Proceedings of the Biological Society of Washington, in 1957, in volume 70, pages 21-30

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 31-32

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 33-34

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 35-40

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 43-44

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 45-47

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 49-60

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 61-68

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Published in Proceedings of the Biological Society of Washington, in 1957, in volume 70, pages 69-109

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 111-117

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 119-127

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 129-180

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 181

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 183-187

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 189-191

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 193

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 195-200

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Published in Proceedings of the Biological Society of Washington, in 1957, in volume 70, pages 201-204

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 205-207

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 209-212

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Published in Proceedings of The Biological Society of Washington, in 1957, in volume 70, pages 213-215

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