84 TUCKERMAN. [Vol. VII. 



inwards, giving the papillae somewhat constricted bases. The 

 adjacent lingual area is smooth and unpapillate. Serous glands 

 are not very abundant. The bulbs fill the lower half or two- 

 thirds of the lateral area of the papillae, their under surface 

 being crowded with them. The mean number of tiers is fifteen. 

 The bulbs are closely set, and I have counted one hundred and 

 ten in a tier, but the mean number is ninety-five. They measure 

 0.057 mm. in length and 0.033 ^ccvcc\. in breadth. 



The Lateral Gustatory Orgatis. — These organs are 4.50 mm. 

 long and 1.40 mm. wide. Each consists of four or five some- 

 what irregular folds. The furrows are dilated at the base, and 

 measure 0.70 mm. in depth. Serous glands are not abundant, 

 but occur within the folds. Their ducts open into the furrows 

 at different levels. All of the folds bear bulbs on their lateral 

 walls. The average number of tiers appears to be fifteen. They 

 measure 0.056 mm. in length and 0.030 mm. in breadth. Bulbs 

 are sparingly present in the fungiform papillae. 



The Tongue of Mustela erminea. 



The tongue is smaller than in Piitorms vison, but both possess 

 many of the same general characters. All of the fungiform 

 papillae examined contained bulbs, one usually being present at 

 the upper part of each papilla. They measure 0.027 mm. in 

 length and 0.016 mm. in breadth. Serous glands are not abun- 

 dant. The circumvallate papillae were not investigated. 



The Tongue of Felis tigris. 



General Description. — The organ is 200 mm. in length, 66 

 mm. in breadth, and is free from the fraenum for 65 mm. The 

 anterior portion of the dorsum is beset with stout recurved 

 cornified papillae. The fungiform papillae are thinly scattered 

 over the dorsal surface, including the lateral portions and tip. 

 A few fleshy papillae project from the surface at the base of the 

 organ. The tip is flattened and expanded, and the edge papil- 

 lose. The under surface of the free part is smooth or slightly 

 wrinkled, save the lateral portions, which are beset with papillae 

 similar in character to those of the basal region. The line of 

 junction of the upper and lower surfaces at this point is beneath 



