1 88 TUCKERMAN. [Vol. IV. 



The Tongue of Hapale jacchiis. 



This specimen and the two following had been preserved in 

 spirit. They were none of them fully adult. 



General Description. — The anterior dorsal surface of the 

 organ is impressed on each side of the median line by four or 

 five transverse furrows. The fungiform papillae are quite large, 

 though not very numerous. The under surface presents a wide 

 and deep wedge-shaped groove extending from the fraenum to 

 the tip. The tip is obtuse. In Quadrumana the circumvallate 

 papillae are usually three in number. In this specimen, unfort- 

 unately, the tongue had been divided just behind the anterior 

 pair, so that I had no opportunity of examining either the pos- 

 terior papilla or the lateral gustatory organs. The two anterior 

 papillae are 3 mm. apart, and 1.5 mm. from the lateral limits of 



the organ. 



Gustatory Structures. 



The Circumvallate Papillcs. — The papillae are 0.33 mm. in 

 diameter and 0.28 mm. in height. They are flattened on top, 

 and their sides incline inwards at the base. Serous glands are 

 not plentiful. Their ducts open as usual into the trenches at 

 their deeper part. The bulbs are irregularly scattered over the 

 upper surface and sides of the papillae. From horizontal sec- 

 tions there appear to be about thirty-five in a tier. They are 

 quite small, measuring only 0.039 "^"^- ^^ length and 0.025 mm. 

 in breadth. 



The bulbs of the fungiform papillae present the usual appear- 

 ance. The epiglottis was not examined. 



The Tongue of Macacus cynomolgus. 



General Description. — The organ measures 50 mm. in length, 

 16 mm. in breadth, and is free from the fraenum for 15 mm. 

 Fungiform papillae of normal structure are thickly distributed 

 over the dorsum, and also extend on to the under surface. Those 

 about the tips are quite closely set. The circumvallate papillae, 

 of which there are two pairs, — an anterior and a posterior, — 

 are situated well back on the dorsum. The posterior pair are 

 I mm. apart, and 1 1 mm. from the base of the organ. The 

 anterior pair are 6 mm. from the posterior, and are 10 mm. 

 apart. The lateral gustatory organs are placed about as usual. 



