442 



DR. J. E. GRAY ON THE BRADYl'ODID.E. 



[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). 



Arctopithecns 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 lower grinder is mode- 

 rately 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 and throat blackish grey, like the back. <5 . Patch on the back 



Fig. 3. 



Fronl view of skull of Arctopithecus boliviensis. 



