72 TUCKERMAN. [Vol. VII. 



mm. in depth. Serous glands occur within the papillae as well 

 as beneath them, but are not abundant. Their ducts open into 

 the furrows near the base of the folds. The bulbs are irregu- 

 larly disposed at the sides of the folds, there being occasionally 

 twelve or more successive tiers of them. I fail to detect any 

 among the secondary papillae of the upper part of the folds. 

 The bulbs traverse the epithelium obliquely, and measure 0.056 

 mm. in length and 0.028 mm. in breadth. 



The fungiform papillae appear to be of normal structure, and 

 are sparingly supplied with bulbs. 



The Tongue of Tatiisia novancincta. 



General Description. — The tongue is long and narrow, and 

 tapers gradually to a point. It measures 70 mm. in length, 16 

 mm. in breadth posteriorly, and is free from the fraenum for 37 

 mm. The under surface possesses the usual longitudinal ridge. 

 The upper anterior region is transversely grooved, and there is 

 a deep median furrow at the base of the organ. The dorsum is 

 quite densely papillate over most of its extent. The basal por- 

 tion of the tongue bends rather abruptly downwards, as in Dasy- 

 piis scxcinctus and Dasypiis villosus. Papillae of the fungiform 

 type are sparingly scattered over the dorsum, and are also 

 arranged in a single row at the sides, above the line of union of 

 the upper and lower surfaces. The two circumvallate papillae 

 are on the same transverse line, 10 mm. apart, and 18 mm. 

 from the base of the organ. The only indication of a lateral 

 organ of taste is a small opening at each side of the dorsum, 

 near the base of the tongue. 



GUSTATORY STRUCTURES. 



The Circumvallate Papillce. — Seen from above the papillae 

 are oval in shape. They measure 1.05 mm. in length, 0.75 mm. 

 transversely, and i mm. in height. Their summits are rounded, 

 and reach the level of the adjacent lingual surface. The 

 trenches encircling them are narrow and deep. Glands of the 

 serous type are not abundant. Their ducts open into the 

 trenches at various levels, but the greater number discharge at 

 or near the bases of the papillae. Large and small non-medul- 



