264 



SNAKES OF CEYLON. 



long as the frontal, about one-third the breadth of the frontal 

 along a hne connecting the centres of the eyes. Nasal : Entire. 

 Loreal : One. Praeocular : One ; not reaching the top of the 

 head. Postocular : Two. Temporal : One. Swpralahials : 

 Eight ; the Isl touching the nasal, and the 4th the eye. 

 tSublinguals : Two pairs ; the posLerior shorter, touching the 

 4th and 5th infralabials ; quite separated by small scales. 

 Infralabials : Five ; the 61 h largest, and touching two or three 

 scales behind. (Fig. .53.) 



T Po 



Lor 



Fig. 53, — Gerardia prevostiana. 

 (X IJ.) 



