Skull of Dipsadomorphus cynodon. 
Synopsis of the Species. 
I. Anterior palatine teeth not or but feebly enlarged. 
A, Snout longer than the eye. 
1. Preocular not extending to upper surface of head; scales 
in 17 to 21 rows; ventrals 202-250, 
Scales in 21 rows, vertebrals feebly 
enlarged ; subcaudals 76-92...... 1. trigonatus, p. 62. 
Scales in 17 or 19 rows, vertebrals 
strongly enlarged; subcaudals 80- 
LOG 56050 (namie dives (ao kede ee knjee 2. multimaculatus, p. 63. 
Scales in 21 rows, vertebrals strongly 
enlarged ; subcaudals 87-94..... . 8. gokool, p. 64. 
Scales in 19 or 21 rows, vertebrals 
strongly enlarged; subcaudals 94- 
TAO Sep is hades Be'sesb coves os . 4, hewagonotus, p. 65, 
2, Preocular extending to upper surface of head ; scales in 19 
to 23 rows ; ventrals 209-272, . 
a. Posterior chin-shields larger then the anterior ; scales in 
19 or 21 rows; ventrals 214-268, 
