70 COLTTBRIDJE. 



m, n, o. c? (Sc. 29 ; V. 21 1 ; Mexico. 



C. 57), $ (Sc. 83; V. 

 238; C. 53), & hgr. (Sc. 

 35; V. 223; C. 55). 



61. SYNCHALINUS. 



Synchalinus, Cope, Proc. Amer. Philos. Soc. xxxi. 1893, p. 345. 



Teeth equal. Head distinct from neck ; eye large, with round 

 pupil ; nasals and loreal fused into a single elongate shield. Body 

 elongate, compressed ; scales smooth or faintly keeled, with apical 

 pits, in 23 rows ; ventrals sharply angulate laterally. Tail long ; 

 subcaudals in two rows. 



Central America. 



1. Synchalinus corallioides. 

 Synchalinus corallioides, Cope, I. c. 



Similar in general appearance to Corallus Tiortulamts. Snout 

 subtruncate ; rostral slightly visible from above ; internasals sub- 

 quadrate ; praefrontals wider than long ; frontal shorter than 

 supraocular, with concave lateral borders; parietals as broad as 

 long ; nasal in contact with the single praeocular ; two postoculars ; 

 temporals 2 -f 2 ; eight upper labials, fourth, fifth, and sixth entering 

 the eye, last very long; posterior chin-shields longer than the 

 anterior. Scales in 23 rows, three or four median rows faintly 

 keeled. Ventrals 209 ; anal entire ; subcaudals 134. Yellowish 

 brown above, with a dorsal series of parallelogrammic spots of an 

 iron-rust colour, each of which has a small blackish spot at its 

 anterior extremity ; sides with wide vertical spots of the colour of 

 the dorsals, with which some may be confluent, forming with them 

 broad cross bands ; a dark brown band from the eye to the side of 

 the neck ; three dark bars below the eye ; a dark marking on the 

 vertex ; belly dark mahogany on the middle line ; a dark spot on 

 the outer ends of the ventrals, opposite to the lateral vertical bars. 



Total length 450 millim. ; tail 125. 



Buenos Ay res, Costa Rica. 



62. GONYOPHIS. 



Gonyophis, Bvuleng. Ann. 8f Mag. N. II. (6) viii. 1891, p. 290. 



Maxillary teeth 23, equal ; mandibular teeth subcqual. Head 

 distinct from neck, elongate; eye moderate, with round pupil. 

 Body elongate, compressed ; scales feebly keeled, with apical pits, 

 in 19 rows ; ventrals with a suture-like lateral keel, and a notch on 

 each side corresponding to the keel. Tail long ; subcaudals in two 

 rows, keeled and notched like the vontrals. 



Malay Peninsula and Borneo. 



