714 PRIMATES 



small canines and the bushy tail readily mark their distinction from 

 Chrysothrix. Remains of Callithrix have been found in the Brazilian 

 caves. 



Chrysothrix. 1 Head greatly elongated ; orbits large and closely 

 approximated ; canines well developed ; tail with comparatively 

 short hair. 



The small Squirrel Monkeys, of which four species have been 



PIG. 340. The Lemurine Douroucouli (Nyctipithecus lemurinus). From Archives du Museum, 



vol. iv. pi. 2. 



described, are characterised by the great backward projection of the 

 occipital region of the skull, and by orbits approximating in size to 

 those of the next genus. 



Nyctipithecus. 2 Head rounded ; orbits very large, separated by 

 a narrow septum ; nares somewhat approximated. 



The Douroucoulis (Fig. 340), as the members of this genus are 

 called, are of nocturnal habits, in association with which the eyes 

 are of enormous dimensions, as in the Lemuroid genus Loris. The 

 following account of two species of this genus is taken from Mr. 



1 Kaup, Thierreich, vol. i. p. 51 (1835). 

 2 Spix, Sim. et Vesp. Brasil, p. 25 (1823). 



