24 



DR. C. P. S0NNTAG ON THE ANATOMY 



into its hollows. The vallum is finely lobulated. Perhaps this 

 papilla has been formed by fusion of elements similar to those in 

 the mesial limb of H. hoolock (text-fig. 9, 19). 



The two simple lateral papilla? are ovoid, and the papillary 

 bodies and Valiums are granular (text-fig. 7). 



All the papilla? are conical on elevation, the broad ends of the 

 cones projecting beyond the Valiums (text-fig. 9, 17). 



The Conical Papillce (text-fig. 9, 1-13). 

 The conical papilla? have the usual arrangement in clusters and 

 rows of varying degrees of obliquity, and belong to the cylindrical 

 and filiform series. The latter have one or more points, all of' 

 which are directed backwards. Those shown in text-fig. 9," 

 nos. 1-5, have shafts circular on section, but the papilla? (text- 

 fig. 9, 6 -8) are flat. 



Text-figure 7. 



The tongue of Hylobates muelleri. 



a, central fungiform papilla ; b, d, conical papillae ; c, epiglottis ; 1, papillary bounding 

 zone of inferior surface; in, part of f renura ; 11, f renal lamella; o, p, mesial 

 ventral sulcus ; q, pigmented area ; r, unpigmented area. 



At the base of the tongue there are large conical papilla? whose 

 points are directed backwards and inwards. Their surfaces are 

 granular, and they may have prominent secondary papilla?. They 

 are not so well developed as in the Gorilla and Chimpanzee, but 

 their secondary processes are Larger than in either of these 

 animals. They are shown in text-fig. 9, 9-13. 



The Fungiform Papillce (text-fig. 9, 14-16). 

 There is little to note about the fungiform papilla?. They have 

 the same type of arrangement as in the other Anthropoids, and 



