SNAKES OF CEYLON. 



563 



he was still in great pain, and the swelling extended to the 

 shoulder. He rubbed in vinegar, and the man was able to 

 walk two hours later, and recovered. It is evident from this 

 last case that the local effects are sometimes severe. Mr. Green 

 says there are no recorded cases of death or of serious illness 

 from this viper. More reports of casualties would be most 

 acceptable, especially if any constitutional effects are ever 

 noticed. 



Lepidosis. — (a) Typical — Rostral : Touches six shields ; the 

 rostro-nasal sutures subequal to the rostro-internasals, and 

 twice the rostro-labials. Internasals : A pair ; in contact with 

 one another. Supraoculars : Large ; divided into two sub- 

 equal parts. Nasals : Entire or semi-divided ; not confluent 

 with the first supralabial. Preeoculars : Three ; the median 

 and lowest divergent to enclose the loreal pit. Postoculars : 

 Two or three. Suboculars : One ; in contact with the 3rd 

 supralabial and the lowest prseocular. Supraldbials : Nine 

 or ten ; the 1st and 2nd touching the nasal ; the 2nd forming 

 the floor of the loreal pit ; none touching the eye. Infra- 

 labials : Three or four. Sublinguals : One pair. (Fig. 98. ) 



Fig. 98. — Trimereaurus trigonocephalus. 



