ORDER QUADRUMANA. 3C ( 



back, fold their arms on the back, direct their eyes upwards 

 and remain immoveable in this extraordinary position for 

 hours. 



Brisson appears to have been the first who described that 

 curious animal the horned Sajou. He had seen it alive. 

 Linnaeus established it as a species in his Systema Natura, 

 under the name of Fatuellus. 



The first figure of the horned Sajou, taken after a living 

 individual, was published by F. Cuvier in 1820, in his folio 

 work on the Mammalia. 



The horned Sajou arrives at a more considerable size 

 than the others. He is of a soot-coloured brown, nearly 

 black on the head and limbs, more pale on the shoulders 

 and arms. His cheeks are furnished with white hairs, 

 which extend in a very narrow line under the chin ; all the 

 naked parts are of a violet colour, and the skin itself, which 

 is covered by the fur, is of a similar hue. The hairs on the 

 forehead, instead of lying back, like those of the head, rise 

 vertically and form a bandeau, terminated at each extre- 

 mity by a bunch of hairs, much longer than the rest, and 

 which have given rise to the specific appellation of the animal. 

 All the lower parts of the body are much less furnished with 

 hair than the upper, and these last are still better covered 

 in winter than in summer. At that period the horns in- 

 crease, the hairs of the cheeks grow more, and the whole 

 animal augments so considerably in volume, that he is in 

 some measure disfigured. The horns do not appear until 

 the Sajou has cut his canine teeth, which with him is the 

 period of adolescence. 



This animal is by nature very mild and affectionate. 



F. Cuvier notices a variety of the horned Sajou which 

 differs little from the one now described, except in certain 

 shades of colouring, and in having two crescents of white 

 hair above the forehead. 



The Saimiri, or Squirrel monkey, is a beautiful and ele- 



