308 DR. C. F. SONNTAG ON THE ANATOMY 



2he Lateral Organs (text-fig. 30 C). 

 The lateral organs appear as rows of short, furrowed, flat 

 lamina? separated by wide sulci. The rows may form a straight 

 line, or be convex downwards. The right organ is 1"7 cm. long, 

 and has 13 laminae and 14 sulci. The ieft organ is 1'5 cm. long, 

 and has 6 laminse and 7 sulci. 



Lymphoid Tissue and Glands. 

 On the sides of the base there are many small round eminences 

 with central openings, and a few are situated in front of the 

 epiglottis. They are more numerous than in any other Macacus 

 tongue which I examined, but they do not occupy such a large 

 proportion of the tongue as in the Langurs. 



The Frenal Lamella. 



The triangular lamella has a bifid apex, the halves of Avhich 

 taper from a wide base. The edges extend postero-laterally as 

 far as the middle of the lateral organs. The upper surface of the 

 free part is smooth. 



The ventral papillary border is narrow and has few papillae, but 

 these have the usual disposition. 



The median ventral sulcus lodges a triangular crest which is 

 larger than in all other Primates. 



The Barbary Ape (M. inuus). 



Chatin (4) and Munch (8) have described the tongue of M. 

 inuus or ecaudatus, and recorded that it has a vallate triangle. 

 The latter examined thirteen tongues of Macaque monkeys and 

 only found the vallate triangle in this species. 



Text-figure 31. 



a. 6. c. d. e. £ g. h. i j 



The fungiform (A) and conical (B) papilla? of the Macaques. 



The Philippine Macaque (M. philippinensis). 



Mr. R. I. Pocock has lent me the sketch of the frenal lamella 

 which is simply bifid. 



The fungiform papillae (text-fig. SI A) and conical papillae 



