748 DR. C. F. SONNTAG ON THE COMPARATIVE ANATOMV 



finely grannlav ; the fossae are well marked and the Valiums 

 appear as clear zones. They are conical on elevation, the bases 

 of the cones projecting beyond the fossae. In two specimens the 

 papillae are of equal size, but in the third (Mus. R.C.S.) the apical 

 papilla is smaller than the basal ones. 



The fungiform papillae are not numerous, and form a dorsal 

 bounding zone on which they have the usual arrangement in rows 

 and clusters, but the apical cluster is small ; and they are few in 

 number on the ventral papillary zone. 



The conical papillae have the usual arrangement in clusters and 

 rows ; they increase in size from apex to epiglottis, and there is 

 no sharp transition between small conical papillae on the oral and 

 large papillae on the pharyngeal part of the dorsum as in Lemur 

 and Eajxdemur. 



Lateral organs are absent. 



The sublingua differed in two of my specimens. In the first it 

 is tongue-shaped with a broad base whose angles are rounded, 

 and its area is half that of the inferior surface of the tongue. 

 The denticles on the centre of the anterior border are large, but 

 the more lateral ones are smaller. The central part of the sub- 

 lingua is thick and strong, but the lateral parts are thin. On 

 the ventral surface there is only one strong median ridge, and 

 the upper surface has a strong I'idge which is received into the 

 median ventral siilcus of the tongue. The frenum is long and 

 lax, so the sublingua is freely mova.ble. In my second specimen 

 the sublingua has no rounded basal angles, the apical denticles 

 ai-e more closely packed, there is only a faint ridge on the upper 

 surface, and the whole organ is more fixed to the under surface 

 of the tongue. 



The frenal lamellae of the first specimen are broad, with bluntly 

 rounded apices, but they are narrow and pointed in the second 

 example. Supplementary lamellae were present in Pocock's spe- 

 cimen (15). 



The median ventral sulcus has no crest, but receives the ridge 

 on the upper surface of the sublingua. 



Genus LoRis. 

 The Slexder Louis (Loris gracilis). 



The conical tongue narrows rapidly from base to apex, and its 

 proportions are small. 



Three vacate papillae form an isosceles triangle with the apex 

 behind. All are circular, furrowed, and granular, and are sur- 

 rounded by prominent Valiums. None are overlapped by conical 

 papillse. 



The fungiform papillae differ from those of Nijcticehus tarcli- 

 grcidus in that they extend right across the dorsum. They have 

 the usual arrangement in rows and clustei's, but the transverse 



