OF THE TONGUES OF THE MAMMALIA. 



305 



1-4 cm. long, and lias 10 laminae and 11 sulci. The left organ is 

 1-3 cm. long, and has 9 laminae and 10 sulci. 



Specimen No. 3 (text-fig. 27 F) :— The laminae and sulci are 

 short and convex forwards, and the latter look like series of 

 short incisions into the lateral borders of the tongue. The right 

 organ is -8 cm. long, and has 12 laminae and 13 sulci. The left 

 organ is -7 cm. long, and has 11 laminae and 12 sulci. 



The Frenal Lamella. 

 The frenal lamella is triangular. The apex expands and is 

 either rounded and entire, or pointed and bifid. The edges 

 extend postero-laterally almost to the posterior ends of the lateral 

 organs. 



The Toque Macaque (M. pileatus). 



Habitat. Ceylon. 



The spatulate tongue has the following measurements : — Total 



length 4-7 cm. ; length of the oral part 3-9 cm. ; length of the 



pharyngeal part -8 cm. ; width between the lingual attachments 



of the palato-glossal folds 1*7 cm. 



The apex and lateral borders are the same as in M. rhesus, and 

 the same structures are absent. 



Text-figure 28. 



6. 3. 



C. 'J J 



\&/Y/h"'i **-° TIT 



B. C. 



A. 



The vallate papillae and lateral organs of Macacus pileatus. 



The Circumvallate Papillae (text-fig. 28 A). 



The isosceles vallate triangle has an obtuse vertical angle ; the 

 two anterior papillae are small, but the posterior one is large and 

 oval. The fossae are well-marked, and the Valiums are clear, 

 prominent zones. Within the vallate triangle there are both 

 conical and fungiform papillae. 



The conical and fungiform papillae have the usual arrangement, 

 but the latter are large anteriorly and small posteriorly. Large 

 clusters of fungiform papillae are present behind the apex and in 

 front of the lateral organs on the inferior surface. . 



Few orifices of gland ducts are present on the base of the 

 tongue. 



The frenal lamella has a bifid apex and plain sides. 



The Lateral Organs (text-fig. 28 B & C). 

 The laminae and sulci are all short, and are either straight or 



