OF THE TONGUEiS OP THE MAMMALIA. 308 



extremities of the lateral organs. My largest specimen belongs 

 to the latter class and has the following measurements: — Total 

 length 6-6 cm. ; length of the oral part 5-4 cm. ; length of the 

 pharyngeal part 1*2 cm. ; greatest width 2-4 cm. 



The cqjex is rounded, has no mesial notch, and bears conical 

 and fungiform papillae, but the latter are neither numerous nor 

 prominent. The fungiform papillae on the lateral borders and 

 inferior surface are also insignificant and few in number. 



The following structures are absent : — mesial, dorsal sulcus, 

 dor.«al ridges, foramen caecum, lytta, and Apical Gland of Blandin 

 or JSTuhn. 



The Circumvallate Pajnllce. 

 The vallate papillae are arranged in the form of the letter Y or 

 V, and I subjoin detailed descriptions of the vallate areas of 

 three specimens. 



Text-figure 27. 



3 5 7 9 II 12 



°- > 



F. 



The vallate papillae and lateral organs of Macacus sinicus. 



Specionen No. 1 : — The vallate papillae form a Y, with the angle 

 posterior. Each limb has two papillae, so, including the j)osterior 

 papilla, there are five altogether. Each papilla is circular and 

 prominent, its fossa is well-marked, and its vallum appears as a 

 clear zone. On examination through a lens the papillae and 

 Valiums appear granular. The middle papilla of the right limb 

 is displaced mesially, and there is a fungiform papilla between the 

 two mesial papillae, so a false appearance of a Y is produced 

 (text-fig. 27 A). 



S'pecimen No. 2 : — The papillae also form a Y, but the limbs 

 differ greatly. Those of the left limb are close together, but the 

 mesial papilla of the right limb lies close to the posterior 



