QUADRUMANA. 55 
The genital parts, and the circumference round the anus, are of the 
same colour. The buttocks are of a beautiful violet. It is difficult 
to imagine a more hideous or extraordinary animal. He nearly at- 
tains the size of a man, and is a terror to the negroes of Guinea. 
Many details of his history have been mixed up with that of the 
Chimpansé, and consequently with that of the Ourang-Outang. 
Sim. leucopheea, Fred. Cuv. Ann. du Mus. d’Hist. Nat. IX. pl. 37, 
from a young specimen from India, and Hist. des Mammif. from the 
adult. (The Drill). Yellowish grey; face black; tail very short 
and thin; in old ones the fur becomes darker, and the chin of a 
brilliant red. 
Tue Monkeys or tHE New Continent 
Have four grinders more than the others—thirty-six in all; the tail 
long; no cheek-pouches; buttocks hairy; no callosities; nostrils opening 
on the sides of the nose, and not underneath. All the great Quadrumana 
of America belong to this division. Their large intestines are less in- 
flated, and the cecum longer and more slender than in those of the eastern 
continent. 
The tails of some of them are prehensile—that is, its extremity can 
twist round bodies with sufficient force to seize them as with a hand. 
They are more particularly designated by the name of Sapajous, Cebus, 
Erxleben*. 
At their head may be placed the Alouattes (Mycrrrs, JIlig.), which 
are distinguished by a pyramidal head, the upper jaw of which descends 
much below the cranium, as the branches of the lower one ascend very 
high for the purpose of lodging a bony drum, formed by a vesicular in- 
flation of the hyoid bone, which communicates with the larynx, and gives 
to their voice an astonishing volume, and a frightful sound. Hence their 
name of Howling Monkeys. The prehensile portion of the tail is naked 
beneath. 
There are several species, whose distinguishing characters are not yet 
well ascertained, for the colour of the fur on which they are established 
varies with the age and the difference of sexes. 
Simia seniculus, Buff. Supp. VII. 25. (Red Howling Monkey). 
It is often sent to us from the forests of Guiana, where it lives in 
troops; size that of a large fox; colour, a reddish chesnut, rather 
deeper at the head and tail. The Allouatte ourson (Stentor ursinus, 
Geoff.), Humb. Obs. Zool. I: pl. 30, must differ from it very slightly ; 
but it would appear that there are many others, some of which are 
black or brown, others of a pale colour. In certain species this pale 
tint is peculiar to the females}. 
* Cebus or Cepus, Kynmos, names of an Ethiopian monkey, which, from the de- 
seription of Aulian, lib. xxvii. c. 8, must have been the Patas. 
+ Marcgrave, Braz. 226, speaks of a black Guariba, with brown hands, that Spix 
thought he had found in his Seniculus niger. Mem. de Munic, for 1813, p. 333. 
Mycetes rufimanus, Kuhl. 
Marcgrave, 227, speaks of another species, all black and bearded, fig. p. 228, un- 
der the wrong name of Haquima, which must have been, it is probable, the Mycetles 
