282 DR. C. F. SONNTAG ON THE ANATOMY 



The Entellus Langur (P. entellus). 



Habitat : India. 



The tongue differs from that of P. cephalopterus in the following 

 respects: — 1. It is thicker. 2. The vallate papillae are smaller 

 and the posterior vallum is more nodulated. 3. The fungiform 

 papilla? are more numerous. 4. The conical papilla? on the base 

 are larger. In other respects the tongues are similar. 



In the Capped Langur (P. pileatus) the frenal lamella is a 

 broad bilobed plate. 



In the Madras Langur (P. priam,us) the frenal lamella is 

 triangular and bifid, and the apical vallate papilla is small. 



Genus Colobus. 



Flower (5) has briefly described the tongue of the White- 

 thighed Guereza (C. vellerosus) as follows: — 



" The tongue is long and narrow, with three large circum- 

 vallate papillae forming the corners of a triangle, with the apex 

 directed backwards ; close behind each of the large anterior ones 

 is a smaller one of the same form. At the lower part of the 

 frenum is a short, thick, fleshy salivary papilla, constricted at the 

 base, then dilating, and pointed and bifid at the extremity." 



Flower does not describe the condition of the glands on the 

 base of the tongue, but points out that the salivary glands, 

 especially the submaxillaries, are very large, and he gives 

 measurements. As the diet and stomach closely resemble those 

 of the Langurs, and cheek-pouches are absent in the Guerezas, 

 the physiology of the tongue and stomach is similar to those of 

 the former, which I have described on page 280. 



The tongues of the members of the genera Presbytes and 

 Colobus, as will be shown later, differ from those of the other 

 Cercopithecidffi chiefly in the nature of the glands on the base. 



Genus Cercopithecus, 



The species are here arranged in the groups described by 

 Pocock (9) :— 



THE ALBIGULARIS GROUP. 

 Species examined : C. preussi ; G. albigularis. 



Preuss's Cercopitheque (C. preussi). 



Habitat : Cameroons. 



The conical tongue has the following measurements : — Total 

 length 5-4 cm.; length of the oral part 4 - 6 cm.; length of the 

 pharyngeal part *8 cm. ; width between the lingual attachments 

 of the palato-glossal folds 2-5 cm, 



