560 



DOROUCOULIS 



that of Mycefefi. ISTevertheless Professor Weldon^ has found in 

 a female of C. ijigot a patch of ossification on the thyroid cartilage 

 of the larynx which may be an indication of something more in 

 the male. There are eleven species. 



JSfycMpitJiecus, the Doroucouli Monkeys, is a genus of some- 

 what Lemurine appearance, caused by their large eyes. But they 

 reminded Bates of an Owl or a Tiger-cat ! They have a long, but 

 not prehensile tail. As in the Marmosets, the lower incisors 

 project forwards in a Lemurine fashion. The thumb is very 

 short. A peculiarity of this genus is the twenty- two dorso- 

 lumbar vertebrae. As in Glory&othrix, but not as in Gallitlirix, 

 the hemispheres of the brain are smooth. There are five species, 

 of which one occurs so far north as Nicaragua ; the rest are 

 Brazilian, extending down to the Argentine. 



The Ouakari Monkeys, Bracliyurusf are, as the name denotes, 

 short -tailed forms. Two species, B. rubicundus and B. calvus. 



Fig. 266. — "Red-facpd Oiiakari. Brndiyitnis rvhicundus. x\ 



have bright red faces ; B. iiidanoce,j)ludv,s has a black one. 

 There is a small thumb. The brain is fairly convoluted, and is 

 to be specially compared with that of Cehus and Pithecia. The 



^ "Notes on Callithrix gigot," Proc. Zool. Hoc. 1884, p. 6. 

 - Forbes, Froo. Zool. Soc. 1880, p. 639. 



