No. 2.] ON THE GUSTATORY ORGANS. 1 83 



Serous glands are fairly abundant, and their ducts discharge as 

 usual. The bulbs are disposed at the sides of the folds in some 

 fourteen tiers. They vary but slightly from those of the cir- 

 cumvallate gustatory area, and measure 0.060 mm. in length 

 and 0.029 mm. in breadth. 



The bulbs of the fungiform papillae are rather small and not 

 very numerous. They are placed as usual. The larynx was 

 not examined. 



The Tongue of Canis latrans. 



General Description. — The organ measures 125 mm. in length, 

 30 mm. in breadth, and 20 mm. in thickness. It is free from 

 the fr^num linguse for 38 mm. The upper surface is marked 

 for nearly its entire length by a mesial groove or raphe. At 

 the extreme basal region are the usual fleshy elevations, and 

 the under surface presents a more or less wrinkled appearance. 

 The fungiform papillae are largest and most closely placed just 

 anterior to the circumvallate area, and are smallest along the 

 median groove and about the tip. The circumvallate papillae, 

 seven in number, are arranged in two rows, slightly converging 

 posteriorly, one on each side of the median line. The lateral 

 gustatory organs are placed nearly as in Canis liipiis, their pos- 

 terior limits being on the same transverse line as the anterior 

 pair of circumvallate papillae. 



Gustatory Structures. 



The Circumvallate Papillce. — The papillae, like those of Canis 

 lupus, are laterally involuted. They vary greatly in size, but 

 average about 0.95 mm. in diameter and 0.80 mm. in height. 

 The adjacent lingual surface is papillate, and the papillae them- 

 selves are more or less verrucose and occasionally cleft. Serous 

 glands are not very plentiful. Their ducts discharge at various 

 levels. The bulbs of the papillae are limited to the lower third 

 of the lateral area, where they are disposed in ten to twelve 

 closely packed tiers. They are also irregularly scattered in the 

 outer wall of the trench. There are about sixty-five bulbs in a 

 tier of the papilla. They measure 0.058 mm. in length and 

 0.033 ^^™- i^ breadth. 



The Lateral Gustatory Organs. — These organs measure 5 mm. 

 in length. Each consists of seven or eight folds varying slightly 



