320 toU. C. F. SONNTAG ON THE ANATOMY 



The Fungiform Papillce (text-fig. 35). 



The fungiform papillae have the usual arrangement, but the 

 rows are maintained far forwards. They form a dorsal bounding 

 zone on which they are numerous, but they are scanty on the 

 ventral zone. 



All are hemispherical, and smooth or granular. ISfone are 

 overlapped by conical papillae. 



The Conical Papillce (text-fig. 35). 



Arrangement. — Behind the apex there is a dense cluster, but 

 behind this the papillae are all in oblique chains. No transverse 

 rows are present. Between them the interpapillary dorsum 

 appears in the form of strips. 



The papillary bodies are flat, conical, cylindrical or tuberose, 

 and they have one or more processes which are directed in the 

 usual manner. They are not, however, arranged in zones as 

 in P. porcariits. 



The Lateral Organs (text-fig. 34). 

 Small rounded lamellae are separated by wide primary sulci, so 

 the organs look like rows of small oval bodies. They lie entirely 

 on the lateral borders. The right organ is 1-3 cm. long, and has 

 8 laminae and 9 sulci. The left organ is 1-2 cm. long, and has 

 10 laminae and 11 sulci. 



The Frenal Lamella (text-fig. 36). 



The triangular lamella has a rounded apex with a small fissure, 

 but no transverse sulci are present on the upper surface. The 

 edges have small tubercles posteriorly. 



A few orifices of ducts and pits are present on the sides of the 

 base. 



The mesial ventral sulcus has a mesial crest, and the freniom is 

 long and lax. 



Flower (5) states that there is one posterior vallate papilla, but 

 there may be small ones merging into fungiform papillae, and the 

 latter are large. 



The Mandrill (P. mormon). 



Miinch (8) has pointed out how the tongue of P. mormon has 

 a well-developed lateral organ. 



In the specimen which I examined there are fi.ve vallate 

 papillae in the V- formation. The mesial papilla of each limb is 

 small, the two anterior papillae are large and round, a]id the 

 posterior papilla, which is the largest of all, is oval (text-fig. 34). 



The left lateral organ has seven laminae and eight sulci, and the 

 right organ, whose ridges are all furrowed, has fi.ve laminae and 

 six sulci. 



