OP THE TONGUKS OF THE MAMMALIA. 



287 



The Mona Cercopitheque [C. mona). 

 Habitat : "West Africa. 



The fresh tongues did not reveal the vessels running between 

 the base and the vallate area. 



The following measurements refer to an adult specimen : — 

 Total length 3"5 cm.: length of the oral part 2*9 cm.; length of 

 the pharyngeal part "6 cm. ; width between the lingual attach- 

 ments of the palato-glossal folds 1*9 cm. 



One of my specimens (adult) has an apical notch whence a 

 median sulcus runs back for 1*05 cm., but the yoving specimen 

 has neither. In other respects, however, the apex and lateral 

 borders have the same characters, and the lateral parts of the 

 doi-sum have the same clusters of fungiform papillee as in 

 C. hurnetti. 



Text-figure 19. 



F. .. 



MtWM 



9 876 5 4 3 2/ 



•LB. 



F.R 



The tongue of Cercopitliecus mona. 



The Circumvallate Papillce (text-fig. 19 C, D, & E). 



The vallate triangle is isosceles. The three papillee, especially 

 the posterior one, are prominent as in C. hurnetti. One tongue 

 has a finely-granular posterior vallum, but the latter is coarsely 

 nodular in my other specimen (text-fig. 19 D). Within the 

 vallate area there are more fungiform papillae than in C. hurnetti. 

 The anterior papillae are oval, but the posterior one is circular, 



Miinch (8) described a vallate triangle, 



