OF THE TONGUES OF THE MAMMALIA. 751 



directed backwards ; the basal papillae are small and circular, and 

 the apical papilla is large, circular, and granular, witli a patulous 

 fossa. 



The fungiform papillae ai-e not numerous, but stand up 

 prominently. They have the usual arrangement, but tlie apical 

 cluster is small. They form a well-marked row of closely-set 

 elements on the posterior third of each lateral border of the 

 tongue. None are present on the inferior surface of the tongue. 



The conical papillfe give the surface of the tongue a finely- 

 granular appearance. They increase in size fi-om before back- 

 wards, and thei-e is no sharp contrast between the papilla? on the 

 oral and pharyngeal parts of the tongue as in Lemur and 

 Hapalemur. When tlie tougue is dried they stand up promi- 

 nently and reach a higher level than the summits of the 

 fungiform papillae. They form a narrow venti-a,l papillary zone. 



Lateral organs are absent. 



The sublingua (text-fig. 69), which is flat, horny, and tongue- 

 shaped, has a rounded, denticulated, comb-like anterior border, 

 and nearly parallel, entire edges. It has a well-marked median 

 crest, but no lateral ridges, and it covers a larger area of the 

 under surface of the tongue than that of the Galago. 



The frenal lamellfe are small and pointed, and the mesial 

 ventral sulcus does not contain a. crest. 



Pocock (15) described nine apical denticles on the sublingua of 

 Galago monieiri. 



Family C n i k o m y i D je. 



Genus Chiromys. 

 The a ye- Aye (C. madagascariensis). 



The following description is supplementary to the existing 

 accounts by Owen (13) and Peters (14) : — 



Measurements. — Total length 4-6 cm. ; oral part 3*1 cm. ; 

 pharyngeal part -5 cm. ; width between the lingual attachments 

 of the palato-glossal folds 1*6 cm. 



The apex is thick and rounded, but has no notch, and the 

 massive lateral borders are devoid of lateral organs. Mesial 

 doi'sal and mesial ventral sulci are absent. 



Three cii'cumvallate papillas are arranged in the form of a 

 triangle with the apex behind. All are circular and granular, 

 and surrounded by nodulated Valiums. Owen described two 

 papillfe, about two lines apart, lying about an inch and a half 

 behind the apex of the tongue. Peters recorded three papillae 

 arranged in a triangle, and figured nodulated Valiums. 



The fungiform papillae ai^e not numerous. They extend right 

 across the dorsum, but are scanty in the middle line. They have 

 the usual arrangement, but the apical dorsal cluster is small. 

 One large papilla bisects the base of the vallate papillary triangle. 



