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forming longitudinal ridges. Ventrals keeled. Femoral pores 

 none. Inguinal pores, one or two on either side. Tail with rings 

 of keeled quadrilateral shields, 



T. sexlineatus, Daud. 



Dorsal scales in four longitudinal rows. Ventrals, in six cen- 

 tral and three lateral rows on each side, in all twelve longitudinal 

 rows, and twenty -two or three transverse. Chin shields three 

 pairs. Colour greenish bronze above, with sometimes a pair of 

 silvery bands. Sides greenish, separated from the back by a 

 narrow black line running from the nostril through the eye and 

 tympanum. Beneath yellowish. Length fourteen inches, of 

 which the tail is nearly five-sixths. Body 25 ; tail 11"5 = 14 

 inches in Giinther's specimen. 



Inhabits Kachar, Assam, and Birmah. 



Stoliczka's Sikkim specimen had two nasal shields, vide J. A. 

 S,, 1872, part 2, p. 87. 



T. Haughtonianus, Anderson. P. Z. S., Lon., Feb. 1871. 



Dorsal scales in six longitudinal rows. Ventrals in ten lon- 

 gitudinal and twenty-seven transverse rows. Chin shields four 

 pairs the last as large as the three anterior ones. Colour similar 

 to sex-lineatus, but the back is darker, and the lateral green 

 stripe broader. Tail, a trifle over, four-fifths of entire length, 

 (type 2.3 -H 5.9 = 8.2). 



Inhabits Goalpara, Assam. 



Cabkita, Gray. 



Nasal shields swollen, variable in number. No collar, but 

 a fold before the shoulder. Lower eyelid with a large trans- 

 parent disk. Dorsal and lateral scales keeled, similar, in oblique 

 rows. Ventrals quadrate, smooth, in longitudinal rows. Fe- 

 moral pores. Colouration brown, not gray. 



C, Leschenaultii, D. et B. 

 Nostril at the extremity of the muzzle ridge between two 

 shields forming a suture with the rostral, and followed by two 

 small post-nasals. Ventrals in six longitudinal and twenty-three 



F 



