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Show 432 l)l(. .1. B. GRAY ON THE BRADYPODIDA. [MaV 2, Fig. I. Skull of Cholcepus didactylus. Palnte of Cholcepus didactylus. Var. columbianus. A specimen in the Museum, purchased of M . Parzudaki as comins; from Columbia, is of a pale whitey-brown paper colour, darker at the root of the hairs, and has pale horn-coloured claws. I believe it is a pale variety of C. didactylus, differing in being of a pale colour and having longer hairs ; but, like the hairs of that species, they lav regularly and form a uniform fur, whereas the hairs in C. hoffmanni are irregularly disposed and scattered in all directions, forming a very rough flaccid long fur. It may be designated, until we have the power of examining more specimens and comparing its bones with other species, C. didactylus, var. columbianus. 2. CHOLCEPUS HOFFMANNI, Peters; Gray, Cat. of Edentates Brit. Mus. p. 363. A specimen sent by Dr. Peters as a type of this species, and another specimen purchased of Mr. Cariniol, from Costa Rica, as a |