No. 2.] ON THE GUSTATORY ORGANS. 1 79 



Gustatory Structures. 



The CircMnvallatc Papilla. — The papillae are 0.30 mm. in 

 diameter and 0.25 mm. in height, and project somewhat from 

 the opening of the trench. They are flattened on top with 

 symmetrically sloping sides curving downwards and inwards, 

 the bases of the papillae in consequence being somewhat con- 

 stricted. The trenches are uniform in breadth and fairly deep. 

 Serous glands are only sparingly present. There are five or 

 six tiers of bulbs, the uppermost tier sometimes being on a 

 level with the opening of the trench. In horizontal section I 

 counted fifty bulbs. They measure 0.050 mm. in length and 

 0.028 mm. in breadth. 



All of the fungiform papillae examined bore bulbs, but they 

 were smaller than those of the circumvallate papillae. Bulbs 

 were also plentiful in the epithelium of the epiglottis and else- 

 where in the larynx 



The Tongue of Antilocapra americana. 



The material consisted of a single fresh specimen. It was 

 hardened by the method adopted with Lepiis, etc. 



General Description. — The organ measures 180 mm. in 

 length, and possesses the general characters of the ruminant 

 tongue. The fungiform papillae resemble black or dark-colored 

 beads, and are quite numerous, especially about the tip, includ- 

 ing its inferior portion. They are also arranged lineally on 

 each side of the dorsum from the tip to the gustatory area, 

 where they are not easily distinguished from those of the 

 circumvallate type. The circumvallate papillae are grouped in 

 two main portions, on each side of the median line, at the 

 posterior part of the dorsum. There appear to be about twenty- 

 six papillae on a side, those most posteriorly placed being 

 34 mm. from the base of the tongue. 



Gustatory Structures. 



The Circumvallate Papillce. — The papillae are flattened or 

 slightly rounded on top, and their sides are vertical or nearly so. 

 The epithelium investing the lateral area is less thick than that 

 of the upper surface, the latter in turn being much thinner 

 than that of the adjacent lingual area. The papillae measure 



