OCR Text |
Show 442 DR. J. E. GRAY ON THE BRADYPODIDA. [May 2, and throat with hair like the back, but rather darker. Skull: the upper postorbital tubercle scarcely produced ; the lower jaw short, strong, the front part high and much thickened ; angle of the lower jaw broad, rounded, and scarcely produced. (P.Z.S. 1849, t. xi. f. 2, no. 919a). Bradypus tridactylus brasiliensis, Blainville, Osteogr. Bradypus, t. ii. (skull). Arctopithecus blainvillei, Gray, P.Z.S. 1849, p. 71, t. xi. f. 2 (skull); Cat. Edentata, p. 365. Hab. Brazil. There are four skulls of this species in the British Museum, which are all very much alike, but differ in the convexity of the forehead. There are two specimens with their skulls, and one younger, which appear to belong to the same set. The front tower grinder is moderately broad and flat and smooth in front in all the four specimens, not quite so broad as the corresponding tooth in A. boliviensis; and the lower jaws are rather stronger and blunter in front than in that .species. 4. ARCTOPITHECUS BOLIVIENSIS. B.M. Blackish grey ; frontal band extending on to the temples, streak under the eye-streak and cheeks white ; forearms, shoulders, and front of the back mottled with whitish colour ; hinder part of the back, rump, and thighs white, with one or two small brown spots; chin aud throat blackish grey, like the back. _?. Patch on the back Palate of Arctopithecus boliviensis. Fig. 4. Front view of skull of Arctopithecus boliviensis. |