TRIMERESURUS CARINATUS. 
One of the Crotalide or Pit Vipers, found in Bengal, Sikkim, and 
sub-Himalaya and Burmah. Giinther’s description is as follows :-— 
“The second upper labial shield forms the front part of the facial pit. 
Scales in from twenty-three to twenty-five rows; those on the crown of 
the head and on the temples small, strongly carinated. Ventrals, 164-169: 
sub-caudals, 34-60. Grass green above, tail yellowish green; a more or 
less distinct yellowish line runs along the outer series of scales, and is 
sometimes absent. Lower parts greenish white. The general colour 
is usually green ; sometimes there are large blackish spots on the sides ; 
the lateral line is either well developed, white margined, with coral red 
below, or it is absent. Tail pale, ruddy above, usually equal to one- 
sixth the total length.” 
