133 



Synopsis of Indian, Ceylontse, and Burmese Species. 



A. No fold in front of the shoulder. 



a. Lateral scales pointing backwards and 



downwards. 



a'. Upper dorsal scales pointing back- 

 wards, larger than ventrals C. microlepis, p. 134. 



b'. Upper dorsal scales pointing back- 

 wards and upwards, smaller than 

 ventrals C. cristatellus, p. 134. 



c'. Only the scales of the row at the base 



of the dorsal crest point upwards . . C. jubatus, p. 135. 



b. Lateral scales pointing backwards and 



upwards. 



a'. 35 to 47 scales round middle of body ; 

 tympanum at least half diameter of 

 orbit C. versicolor, p. 135. 



b'. 53 to 61 scales round middle of body ; 

 tympanum not quite one third dia- 

 meter of orbit C. maria, p. 136. 



B. An oblique fold or pit covered with small 



granular scales in front of shoulder, not 

 extending across throat. 



a. Dorsal scales larger than ventrals, keeled. 

 a'. Two serrated parallel ridges on each 



side of back of head ; colour green. . C.jerdonii, p. 137. 

 b'. A long spine behind supraciliary edge, 



and two others above ear C. emma, p. 137. 



c'. No postorbital spine; a few small 



spines above ear C, myskacem, p. 138. 



b. Dorsal scales larger than ventrals, smooth 



or nearly so. 

 a'. Lateral scales pointing upwards and 



backwards ; 29 to 35 scales round 



middle of body C. grandisquamis, p. 138. 



6'. Lateral scales pointing upwards and 



backwards; 37 to 43 scales round 



middle of body C. nemoricola, p. 139. 



c'. Lateral scales pointing upwards and 



backwards, or straight backwards; 



60 scales round middle of body .... C. ceylonensis, p. 139. 

 d'. Lateral scales pointing downwards 



and backwards C. liolepis, p. 140. 



c. Dorsal scales of same size as ventrals or 



smaller, 

 a'. Lateral scales pointing upwards and 



backwards C. ophiomachus, p. 140. 



b'. Lateral scales pointing downwards 

 and backwards ; ventrals much larger 



than dorsals C. niyrilabris, p. 141. 



. Lateral scales pointing downwards and 

 backwards; no spines whatever on 

 head C liocephalus, p. 141. 



