70 COLUBRID. 
m,n,o.d (Se. 29; V.211; Mexico. 
C. 57), 9 (Se. 33; V. 
238; C. 53), & her. (Se. 
35; V. 223; C. 55). 
61. SYNCHALINUS. 
Synchalinus, Cope, Proc. Amer. Philos. Soc. xxxi. 1893, p. 545. 
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, J. ¢. 
Similar in general appearance to Corallus hortulanus. Snout 
subtruncate; rostral slightly visible from above ; internasals sub- 
quadrate ; prefrontals wider than long; frontal shorter than 
supraocular, with concave lateral borders; parietals as broad as 
long ; nasal in contact with the single preocular; two postoculars ; 
temporals 24+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 Ayres, Costa Rica. 
62. GONYOPHIS. 
Gonyophis, Bouleng. Ann. § Mag. N. H. (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; subcaudals in two 
rows, keeled and notched like the ventrals. 
Malay Peninsula and Borneo. 
