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21 of Ermines to illustrate his remarks upon the changes in the color of hair. The Curator prepared and submitted for publication an epitome of the natural history of the Puma, and brought together a considerable amount of material for an account of the natural history of other North American cats. He also prepared a description of the skeleton of the rare dolphin, [[underline]]Prodelphinus longirostris[[/underline]], and an account of the life-history of the Bottlenose porpoise. He submitted an annotated list of the mammals collected by the U. S. Eclipse Expedition to Angola. Papers based more or