l8o TUCKERMAA'. [Vol. IV. 



1. 20 mm. transversely, and are i.io mm. in height. At their 

 upper part they bear many small secondary papillae. The 

 trenches are narrow and of uniform width. Serous glands are 

 plentiful, and their ducts usually open at the bottom of the 

 trenches. (A few of the papillae show a marked reversion to an 

 earlier type. They consist merely of a simple semicircular 

 ridge, partially roofed over above, and bearing bulbs over its 

 circumference.) The bulbs are disposed in several tiers. In 

 some papillae the tiers are quite closely set, while in others 

 there is considerable space between them. When closely set 

 they are usually restricted to the middle portion of the lateral 

 wall, the space above and below being destitute of them. The 

 mean number of tiers is about twelve, and there are upwards of 

 eighty bulbs in a tier. They measure 0.069 ^^^i. in length and 

 0.032 mm. in breadth. 



No lateral gustatory organs were detected. Thus far in the 

 Ruminantia they have only been found, I think, in Traguhts 

 javaniais, Catnelopardalis giraffa, and Antilope mergens. 



The fungiform papillae are of the usual type and bear bulbs. 

 The latter, however, appear to have relatively decreased in num- 

 ber, this perhaps being due to the unusual extent of bulb- 

 bearing surface offered in the gustatory area proper of the 

 tongue. 



A few bulbs are present on the anterior surface of the epi- 

 glottis. Mucous glands are also abundant in this region. 



The Tongue of Lutra canadensis. 



I received several specimens of this tongue, all but one of 

 which were fresh. The fresh specimens were prepared by the 

 method employed for the preceding tongue. The spirit speci- 

 men was from a very young animal, and the hardening was 

 completed in ordinary alcohol. 



General Descriptioji. — The organ is 71 mm. long, 23 mm. 

 wide, and 5 mm, in thickness. Anteriorly it is much tied down, 

 the free portion being only 1 5 mm, in length. The upper sur- 

 face is covered with filiform papillas, the apices of which are 

 directed backwards. When stroked in the opposite direction, 

 the papillae convey the feeling of a very fine rasp. A wide but 

 shallow median furrow leads from the area of the circumvallate 

 papillae to the tip. The circumvallate pajDillae, seven or eight 



