522 DR. C. F. SONNTAG ON THE ANATOMY 



band of small nodules which also 'passes towards the posterior 

 vallate papilla. Some of the large nodules have small central 

 pits. 



The Lateral Organs. — The laminfe, which increase in size from 

 before backwards, are separated by wide primary sulci. The right 

 organ has 3 laminae and 4 sulci, and the left one has 4 laminte and 

 5 sulci. t 



The Inferior Surface (text-fig, 52 B). — The ventral papillary 

 border, which is narrow, possesses conical papillae only. 



Text-fieure 52. 



J'V^.::-v:-':- 



' A. 



The tongue of Mi/stax ursulus. 



w. 



The ventral mesial sulcus, which is long, narrow, and deep, 

 opens posteiiorly into a large tria,ngular depression containing a 

 well-mai'ked median crest. 



The frenal lamella is a long, flat body with its anterior 

 extremity deeply cleft into several long, thin club-like processes. 



The Moustache Tamarin {M. mystax). 



The tongue, whose form resembles those of the preceding 

 species, has the following measuremeiits : — total length 2*1 cm. ; 

 length of the oral part 1'8 cm. ; length of the pharyngeal part 

 •3 cm. ; width between the lingual attachments of the palato- 

 glossal folds '6 cm. 



A. deep median dorsal sulcus runs back for I'l cm. from the 

 apex, and transverse furroivs run towards the lateral borders ; 

 these separate broad ridges which are convex forwards and con- 

 cave backwards. 



The Circumvallate Pajyillce. — Three papillae form an isosceles 

 triangle with two short sides and a long base ; the apical papilla 

 is close to the epiglottis, and the basal papillae are close to the 

 lateral borders of the tongue. 



