262 GLASS MAMMALIA. 



These two species resemble each other as closely in moral 

 as in physical characters. They are less petulant, less 

 irascible, less unmanageable, than the Green Monkey, or 

 the Malbrouc. They both have a mode peculiar to themselves 

 of expressing their feelings, which is by raising their lips 

 and showing their teeth, in a manner somewhat resembling 

 a laugh. They are continually in action, assume a variety of 

 attitudes, and sometimes the most grotesque. From the 

 wonderful variety and vivacity of their motions, one would 

 almost think that their limbs possessed a greater number of 

 articulations and more strength than those of other Guenons. 

 The females are more calm, and of a more gentle and insi- 

 nuating disposition than the males. One singular pecu- 

 liarity they exhibit, which is the carrying of their tails com- 

 pletely reversed, almost in a straight line parallel to the 

 back. They seem to be confined to intertropical Africa. 



The Negro-monkey, which in its adult state, was described 

 by Edwards, and when young by Schreber, is named from a 

 supposed resemblance in its countenance to the Ethiopian 

 variety of mankind. It is in general under eighteen inches 

 in the length of the body : the tail is about equally long. 

 The colour of this animal when young is yellow (as our 

 author observes), lighter on the belly, and tinged with brown 

 down the middle of the back. It afterwards becomes much 

 darker, and the back grows a dark gray, slightly tinged. with 

 yellow or brown. The thumbs, which on the fore-hands 

 are short, are long and strong on the lower extremities. 

 The hair is long, especially round the face, and falls back- 

 ward from the head, but sticks out laterally from each 

 cheek. 



The numerous citations of authors which we find in sys- 

 tematic writers on zoology, would naturally lead us to sup- 

 pose that the animals, which are the subject of description, 

 have been observed by many, and that in the union of their 

 accounts a complete history of those animals was to be 

 found. We discover, however, on examining these numerous 



