No. 2.] ON THE GUSTATORY ORGANS. 159 



about seventy-five bulbs. The apex of the papilla is free from 

 bulbs, but the ridge behind it bears them over the whole of its 

 circumference. The bulbs were too indistinct for their finer 

 details to be studied. 



Papillae of the fungiform type are not very abundant, but 

 appear to be of normal structure. They are largest on the 

 dorsum and sides, just in front of the circumvallate papillae, and 

 contain bulbs. The usual fringe of filiform papillae at the side 

 of the base of the tongue, just above the lateral organ of taste, 

 was present. Below the fringe were a few small, mound-like 

 elevations, which doubtless marked the seat of the lateral taste 

 organ. Similar elevations are present in Halmaturus and other 

 marsupials. Unfortunately, the material was not in a condition 

 for closer examination. The epiglottis was not examined. 



The Tongue of Dasypus peba. 



The material consisted of two spirit specimens, — a whole 

 tongue and the back part of a smaller one. 



General Description. — The tongue is long and narrow, and 

 tapers gradually to a point. It measures 5 1 mm. in length and 

 near the base is 10 mm. in diameter. It is free for 34 mm. from 

 the fraenum, two-thirds of its entire length, and is thus capable 

 of great prehensile power. The under surface is finely wrin- 

 kled, and marked by a median ridge extending from the fraenum 

 to the tip. The ridge is impressed longitudinally by two parallel 

 grooves. It is likewise transversely furrowed, the furrows being 

 parallel and 1.5 mm. apart. The anterior two-thirds of the pa- 

 pillate surface is sheathed with a thick layer of partially corni- 

 fied epithelium. The posterior third is transversely wrinkled, 

 the furrows being parallel and running across the tongue. The 

 basal end of the organ bends somewhat abruptly downwards, 

 forming a kind of pit. From this pit a deep groove extends 

 along the middle of the dorsum for 6 mm. Fungiform papillae 

 are not numerous, but are quite evenly distributed over the 

 middle and anterior dorsal surface and upon the sides. Some 

 of the papillae appear to be set in furrows, with their summits 

 below the level of the lingual surface. The circumvallate 

 papillae are two in number. They are 5 mm. apart, and 15 mm. 

 from the base of the organ. I failed to find the lateral organs 



