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Dall, W. H., '77. A provisional hypothesis of saltatory evolution. Am. 

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'90. On dynamic influences in evolution. Biol. Soc. Wash. 



'94. The mechanical cause of folds in the aperture of the shells of gastero- 

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Davenport, C. B., and Castle, W. E., '95. On the Acclimatization of or- 

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Fischer, E., '94. Transmutation der Schmetterlinge infolge Temperatur- 

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