48 



T. BOTHRIOEHYNCHUS, Qunther. 



Scales 24. Diameter /j. Four sutural grooves in the 

 lower part of the snout. Uniform brownish olive. 

 Penang. 



T. STEiOLATUS, Feters. 



Scales 24. Each scale with a yellow, posteriorly black- 

 edged, cross-streak. 



Bengal. 



T. SIAMENSIS, Othr. 



Scales 22. Diameter ^'j. Greyish olive, yellowish below. 



T. BRAMiNUS, Daudin. 



Scales 20. Diameter ,*^. Fronto-nasal not in contact 

 with labials. Brown, paler below. 



T. PAMMECES, Gthr. Plate VII, fig. 2. 

 Similar to the preceding. Diameter y*j-. 

 Madras. 



T. MiRUS, Jan. 



Scales 18. Diameter ^\. A subocular present. Brown 

 with yellow snout. 

 Ceylon. 



ONYCHOCEPHALUS, D. and B. 

 Nostril inferior. Rostral with an anterior trenchant edge. 



O. ACUTUS, D. and B. 



Scales 28-29. Longitudinal rows, 500. Diameter ^^. 

 Light bronze, each dorsal scale has a pale centre; 

 yellowish below. 



South of India. 



