174 TUCKERMAN. [Vol. IV. 



in the larynx. They measure in this region about 0.039 "i"^- 

 in length and 0.024 mm. in breadth. 



The Tongue of Sorex cooperif 



The material consisted of spirit specimens. 



General Description. — The organ is 11 mm. long, and is free 

 from the fraenum for 5 mm. The posterior portion is somewhat 

 raised above the level of the anterior, and the dorsum is trans- 

 versely ridged to fit the palatal grooves. The upper surface 

 and sides are beset with small, densely packed, filiform papillae. 

 The papillae are o. 1 5 mm. in height, and bear on their upper 

 part sharp-pointed, recurved, cornified spines. The two cir- 

 cumvallate papillae lie in the same plane, and are 0.5 mm. apart 

 and 3 mm. from the base of the organ. As seen from above 

 they are elliptical in form, and placed obliquely to the long axis 

 of the tongue, with their anterior extremity directed outwards. 

 The fungiform papillae are very small and scattered. Nothing 

 could be detected of the lateral gustatory organs. They are 

 doubtless present, though probably of a simple type. 



Gustatory Structures. 



The Circmnvallate Papillce. — The papillae have a transverse 

 diameter of 0.14 mm., and are 0.15 mm. in height. They are 

 flattened or concave on top, and project but slightly from the 

 opening of the trench. The sides converge somewhat sharply at 

 their lower part, giving the papillae a constricted base. The 

 trenches are narrow and quite uniform in breadth. Serous 

 glands are quite widely distributed through the mucosa and 

 submucosa, but are not very plentiful directly beneath the 

 papillae. Their ducts discharge at the usual places. The bulbs 

 resemble those of the Rodentia. They are arranged in three 

 or four tiers at the lower half of the lateral area, and measure 

 0.033 '^ni. in length and 0.020 mm. in breadth. 



The fungiform papillae bear bulbs at their upper part. The 

 epiglottis was not examined. 



The Tongue of Blarina brevicauda. 



This tongue, a spirit specimen, was not in a suitable condition 

 for minute study, and I am only able to give a very brief gen- 

 eral account. 



