70 COLTJBRID^. 



m, n, 0. S (Sc. 29 ; V. 211 ; Mexico. 



C. 57), $ (Sc. 33; V. 

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

 35 ; V. 223 ; C. 55). 



61. SYNCHALINUS. 



Synclialinus, Cope, Proc. Anier. 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, yvith apical 

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

 suhcaudals in two lows. 



Central America. 



1. Synchalinus corallioides. 



Synchalinus corallioides, Cope, I. c. 



Similar in general appearance to Corallus hortulanus. Snout 

 suhtruncate ; rostral slightly visible from above ; internasals sub- 

 quadrate ; pra3frontals 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 + 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 ; suhcaudals 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 baud 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. 



Euenos Ayres, Costa Rica. 



62. GONYOPHIS. 



Gonyophis, Boulencj. Ann. ^ Mag. N. II. (6) viii. 1891, p. 290. 



Maxillary teeth 23, equal ; mandibular teeth subequal. 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 ; suhcaudals in two 

 rows, keeled and notched like the ventrals. 



Malay Peninsula and Borneo. 



