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Published in Proceedings of the Biological Society of Washington, in 1904, in volume 17, pages 51-52

Published in Proceedings of the Biological Society of Washington, in 1904, in volume 17, pages 1-16

Published in Proceedings of the Biological Society of Washington, in 1904, in volume 17, pages 169-172

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Published in Proceedings of The Biological Society of Washington, in 1904, in volume 17, pages 166-167

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Published in Proceedings of The Biological Society of Washington, in 1904, in volume 17, pages 83-89

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Published in Proceedings of The Biological Society of Washington, in 1904, in volume 17, pages 167

Published in Proceedings of the Biological Society of Washington, in 1904, in volume 17, pages 55-77