( 175 ) 



throughout. Below whitish, posteriorly variegated with black. 

 A V mark on the nabe with its point towards the occiput. 



Grows to 41 inches. (Tail 8"5.) 



Inhabits Assam and Arakan. 



T. nigrocinctus, Blyth. J. A. S., B., 1856, p. 717. 



The penultimate and preceding labial very large. Scales 

 keeled in 17 rows. Colour reddish brown passing into greenish 

 on the neck and head. A black stripe beneath and another 

 behind the eye to the gape, and a broad black patch on either 

 side of the neck. A yeUow collar sometimes present on the neck. 

 Along the back numerous narrow black cross bars (50), not weU 

 defined. Below white dusky towards the tail, the posterior ven- 

 trals being gradually more broadly dark margined posteriorly. 



Grows to 26-5 inches. (Tail 6-5.) 



Inhabits Pegu and Tenasserim. 



T. quincunciatus, Schl. 



T. piscator, Jerdon. J. A. S., B. 

 T. umbratus, Cantor. 

 T. Tytleri, Blyth. 



T. striolatus, Blyth. Apud Theobald. 

 Coluber mortuarius, Baud. (Gunther, An. &; Mag., 

 1872. Vol. IX, p. 27). 



Nostrils valvular, indicative of its essentially aquatic habits. 

 Prsefrontals pointed. One praeocular. Three or four postoculars. 

 Loreal large, square. 9 upper labials, the fourth and fifth enter- 

 ing the orbit. Scales keeled, in 19 rows. Colouration variable. 

 Above, some shade of greyish, brownish or greenish olive with 

 from three to seven rows of black spots down the body in quin- 

 cuncial order. Some specimens are ornamented with red spots 

 on the sides, with dark bars between, these bars being best 

 marked in the young. In others the black spots have dissolved 

 into a asterisk of black lines with yellow dots intermixed. An 

 oblique black streak crosses the temples and eighth labial and 

 another the lower postocular and the suture of the sixth and 



