CEBUS. MAMMALIA. 53 



M. niger, Desm. Araay of Azara. Fur of a very fine black in the 

 male ; sides and under part of the body fawn-coloured in the fe- 

 male and young. About one foot nine inches long ; tail the length 

 of the body. 



Lives in forests, feeding on leaves and fruits, and making itself be heard at break 

 of day by a strong rough voice, which has been compared to the sound of a number 

 of carriages not greased. Inhabits Paraguay, Bahia, and the interior of Brazil. 



M. rujiinanus, Desm. The Red-handed Howler. Fur black ; hands 

 red ; tail the length of the body. 



Gen. J 2. CEBITS, Erxleb. Calliihrix, Geoff. Cuv. 11%. Simia, 



Lin. &c. 



Incisors J, canines i-|, molars f-g, = 36. Superior incisors 

 larger than the inferior ; canines more or less strong, those 

 of the males being much more so than the females ; head 

 round ; muzzle short ; forehead a little prominent ; occiput 

 projecting behind ; facial angle about 60 ; ears rounded ; 

 hyoid bone not projecting ; tail prehensile, but entirely cover- 

 ed with hair. 



Lives in society in forests, but never quits the trees, feeding on fruits and insects. 

 Inhabits South America from the Guianas to Paraguay. M. Desmarest remarks of 

 this genus that the species are difficult to be characterized. The exterior form is 

 nearly the same in all, and preceding authors vary much in the number of those 

 which they admit into their methods. Brisson describes three ; Linnaus four ; 

 Gmelin six ; Buffon two ; and Baron Cuvier reduces them to one. In these circum- 

 stances, M. Desmarest thinks it safer to consider as distinct species all those which 

 have been regarded as such by authors, with the exception of two of Gmelin's. From 

 the researches of Dr Kuhl in the museums of Germany, Holland, and Paris, he is 

 led to think that if all are not separate species they form at least very constant varieties. 



C. robustus, Desm. Fur brown ; a black line above the head and 

 neck and surrounding the face ; arms of a bright yellow ; fore 

 part of the neck and belly of a reddish chestnut in the male, and 

 of a brown pale yellow in the female and young. About 20 in- 

 ches in length. Common in Brazil. 



C. apella, Desm. (Simia apella, Lin.) The Weeper. Fur of a 

 pretty deep brown above, fainter below ; top of the head, tail, 

 and feet of a blackish-brown ; face brown, surrounded with hairs 

 of a blackish brown colour ; external side of the arms and under 

 side of the neck of a yellowish brown. About 18 inches in 

 length. Found in French Guiana Schreb. t. 28. 



C.griseus, Desm. (Cebus barbatus, Geoff,) The Gray Sajou. Fur 

 of a brown fawn-colour, mixed with grayish above ; of a clear 

 fawn-colour below; head capped with black; no beard; arms 

 the colour of the back ; face surrounded with hair of a blackish 

 brown ; sometimes white under the neck and breast. Size of 

 the preceding. Country unknown. Buff. xv. t. 5. 



C. barbatus, Desm. (Cebus albus, Geoff.) The bearded Sapajou. 

 Fur grayish red, varying to gray and white, according to the age 

 and sex ; belly red ; beard prolonged on the cheeks ; hair long 

 and soft. Size of the preceding. Ann. Mus, xix. fig. 12. 



