1871.] DR. J. E. GRAY ON THE BRADYPODID.E. 443 



orange with a black stripe. The lower jaw short, thick, and strong ; 

 the angle of the lower jaw slightly produced beyond the condyle, 

 rounded at the end (921 a). 



Arctopithecus gularis (part.), Gray, P. Z. S. 1849, t. xi. f. 6 (lower 

 jaw). 



5 . Back with a distinct black stripe, with white spots up to the 

 shoulders (9206). 



Arctopithecas marmoratus (jun.), Gray, P. Z. S. 1849, p. 71, t. xi. 

 f. 4 (lower jaw). 



Hab. Bolivia (Bridges'). 



This species is quite distinct from A. cuculliger. A. gularis was 

 formerly thought to include all the species with an orange spot on 

 the back. 



The front lower grinder is large and broad, flat and smooth in 

 front, both in the male and female specimens ; and the upper front 

 grinder is equally rounded. 



There is a series of two males, a female, and young of this species 

 in the Free Museum at Liverpool, from Bolivia, with their skulls. 

 They are all very similar in the form of the lower jaw. The young 

 has very flaccid hair and is probably a male, as it has a small spot 

 of soft black hair between the shoulders, probably the commence- 

 ment of the dorsal patch. 



5. Arctopithectjs marmoratus. 



Fur grey-brown ; back, shoulders, and rump white, black-spotted ; 

 forehead and sides of face with very short soft white hair, which 

 only thinly covers the nose ; eye-streak brown ; dorsal streak di- 

 stinct. Skull : nose narrow, rather elongate ; upper front grinder 

 narrow, cylindrical. Lower jaw slender, elongate, thickened in front ; 

 hinder angle much produced beyond the condyle, tapering, rounded 

 at the end (P. Z. S. 1849, t. xi. f. 3). Front' lower grinder rather 

 broad, three-ribbed in front. 



Male unknown. 



Arctopithecus marmoratus, Gray, P. Z. S. 1849, p. 71, t. xi. f. 3 

 (lower jaw) ; Cat. Edentata B. M. p. 305. 



Hab. Brazil. 



The lower jaw of this species is much more slender and weaker 

 than either of the preceding, and in this respect and in the form of 

 the hinder angle it is like the lower jaw of A. cuculliger, but is di- 

 stinguished from both sexes of that animal by having the chin and 

 throat covered with grey-brown decumbent hair, like the back. It 

 was this similarity that induced me to refer De Blainville's figure of 

 the skull of A. cuculliger to this species in my former paper. 



There is a second specimen in the Museum of which I have not 

 seen the skull, which is somewhat like the type ; but the arms 

 and shoulders are blackish grey, not varied. This specimen is 

 very peculiar for the fur between the shoulder being softer than 

 usual ; but there is no indication of any yellow spot. It may be a 

 distinct species from any here described. 



