172 TUCKERMAN. [Vol. IV. 



and quite movable. They measure i mm. in diameter and 

 0.55 mm. in height. Their free surface is flattened or slightly 

 convex, and they are occasionally cleft at their centre. The 

 trenches are narrow and uniform. Serous glands are not very 

 plentiful. Their ducts appear to open into the trenches at all 

 levels. The bulbs are disposed at the lower half of the lateral 

 area in six or seven tiers. I counted sixty bulbs in a tier, but 

 the circle was not quite complete. The bulbs are closely packed 

 in the tiers, and are fairly uniform in size and shape. They 

 measure 0.052 mm. in length and 0.030 mm. in breadth. 



The Lateral Gustatory Organs. — These organs are about 

 2.40 mm. in length, and consist of five or six irregular folds of 

 the mucosa. The folds bear many secondary papillae, and the 

 epithelium covering them is very much thicker on the upper 

 surface than at the sides. The furrows vary in depth, but 

 average about 0.30 mm. The serous glands and ducts offer 

 nothing unusual either in their position or structure. The bulbs 

 occupy a large portion of the lateral area of the folds, there 

 being from three to five tiers of them. They measure 0.05 1 mm. 

 in length and 0.032 mm. in breadth. 



Most of the fungiform papillae contain bulbs. I found one 

 remarkably fine specimen in this region. It measured 0.056 mm. 

 in length and 0.036 mm. in breadth, and was almost wholly epi- 

 thelial in position. 



Bulbs occur in the epithelium of the epiglottis and elsewhere 

 in the larynx. Those of the anterior surface of the epiglottis 

 are more or less spheroidal, and have a diameter of 0.042 mm, 

 Those of the posterior surface vary in length from 0.033 to 

 0.036 mm. Bulbs are also present on the inner surface of the 

 thyroid and arytenoid cartilages. 



The Tongue of Tamias striatiis. 



I received fresh specimens of this tongue. They were pre- 

 pared for histological examination by the method employed for 

 Leptis, Castor, etc. 



General Description. — The tongue is 22 mm. long, 6 mm. 

 broad, and 5 mm. in thickness. The length of the free portion 

 is 9 mm. The papillate surface is marked anteriorly by a faint 

 mesial raphe. The dorsum in front of the circumvallate area 

 is covered with small recurved papillae, not unlike those of FibcK 



