OCR Text |
Show 1871.] DR. J. E. GRAY ON THE BRADYPODIDA. 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). 2 . Back with a distinct black stripe, with white spots up to the shoulders (9206). Arctopithecus 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 commencement of the dorsal patch. 5. ARCTOPITHECUS 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 distinct. 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. i7a6. 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 distinguished from both sexes of that animal by haviug 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 m y 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. |