ORDER EDENTATA. 277 



gray and yellow ; this hair is shorter and duller in colour 

 than in the Great Unau ; under the belly, it is of a clear 

 musk-colour, shaded with ashen, and this colour grows 

 still clearer under the neck, as far as the shoulders, where 

 it forms a slight streak of pale fawn-colour. The largest 

 claws of this Little Unau are not longer than nine lines. 



Such is, in substance, the account given by Buffon of an 

 individual of this species, which was sent to him from 

 French Guiana, under the name Kouri, without any in- 

 formation concerning its natural habits. 



M. Desmarest enumerates a third species, which he calls 

 the Bradypus with collar, {Bradypus Torquatus of Illiger.) 

 This Bradypus is smaller than the Unau • its body is about 

 seventeen inches in length, and its head three inches and a 

 half; its face is naked and black ; the hairs of the forehead, 

 temples, chin, throat, and chest, are red, short, and frizzled; 

 those on the top of the head, which are longer than the rest, 

 are yellowish ; it has, round its neck, a large collar of long 

 black hairs ; all the rest of the body is of a dirty yellow. 

 Like the Ai and the Unau, its hairs are long and dry; but 

 they are less flatted. At their base is a down very soft and 

 fine, of an extremely deep brown, near the collar, but which 

 diminishes in intensity of colour, from that point as far as 

 the crupper, where it is entirely white. This animal has a 

 very small external ear, concealed under the hair. In this 

 species, as in the preceding, the palm of the hand, sole of 

 the foot, and heel, are completely naked. 



That there are considerable differences in the superficies of 

 different specimens of Sloths, as they successively occur to 

 observation, is certain ; whether these differences constitute 

 specific characters, or merely those of variety, is not so 

 clear; nor is that point, in fact, to be satisfactorily ascer- 

 tained without a much more extended observation on these 

 curious creatures. In the mean time, multiplication of 

 figures is rather a desideratum, as being calculated to assist 



