312 DR. C. F. SONNTAG ON THE ANATOMY 



they have one or more points. TIae interpapillary dorsum appears 

 as streaks. 



Glands and Lymphoid Tissue. 

 The base of the tongue is nodulated, and a few orifices of gland- 

 ducts and pits are present, as in G. cethiopicus. 



The Lateral Organs (text-fig. 33 B). 

 The lateral organs present a very different appearance to those 

 of G. cethiopicus, for they do nob look like rows of small oval 

 bodies. They consist of a series of flat, furrowed, laminae 

 separated by wide primary sulci, and those in tlie centre of the 

 organs are larger than those at the sides. The right organ is 

 1"1 cm. long, and has 10 laminae and 11 sulci. The left organ is 

 1-1 cm. long, and has 8 laminae and 9 sulci. One of the right 

 laminae has three furrows (text-fig. 33 B, a). 



The Frenal Lamella. 



The triangular frenal lamella has a bifid apex, and the plain 

 edges extend back as far as the posterior ends of the lateral 

 organs. 



The ventral jjapillary zone maintains an even width, and the 

 median ventral s^dcus is narrow and deep. 



Genus Theropithecus. 



Garrod (6) has pointed out that the Gelada Baboon [T. gelada) 

 has a triangular vallate area. 



Genus Papio (--^Cynocephalus). 



The Guinea Baboon {P. sphinx). 



Habitat: Africa. 



The. conical tongue has the following measurements : — Total 

 length 6 cm. ; length of the oi-al part 4-6 cm. ; length of 

 the pharyngeal part 1-4 cm. ; width between the lingual attach- 

 ments of the palato-glossal folds 2-6 cm. 



The rounded apex has no notch, and is very thickly clustered 

 with very small fungiform papillae. The lateral borders are 

 rounded and possess many fungiform papillae arranged in the 

 usual manner. At their posterior ends the lateral organs are 

 situated. 



The Gircumvallate Papillce. 



Type — double pair. 



The two anterior papillae are large, circular, smooth and 

 prominent, the fossae are clearly defined, and the Valiums are 

 nodulated, Both posterior papillae, of which the left one is the 



