18b* REPTILES. 



or two anterior, two posterior oculars. Scales smooth, ovoid, 

 not much imbricate, in seventeen or nineteen rows, sometimes 

 those of the vertebral line larger. Anal entire, subcaudals one- 

 or two-rowed ; posterior maxillary tooth longest, grooved ; an- 

 terior ones equal in length. 



Lycodon, sp., Schleg. Ess. ii. p. 1 14, &c. Scytaliens, Dura. cy 

 Bibr. vii. p. 988. 



Synopsis of the Genera. 



1. Hologerrhum. Subcaudals entire; two anterior oculars. 



Philippines. 



2. Scytale. Subcaudals entire; one anterior ocular. South 



America. 



3. Oxyrhopus. Subcaudals bifid. South America. 



1. Hologerrhum, G'dnther. 



Body and tail moderate, rounded, tapering behind. Head 

 depressed, with flat crown and rather short muzzle, not very 

 distinct from neck ; eye moderate, pupil elliptical, erect ; ros- 

 tral moderate ; two anterior, two posterior oculars, one loreal ; 

 nasal one (?) ; nostril situated in the front part. Scales smooth, 

 in seventeen rows ; anal and subcaudals entire. Posterior max- 

 illary teeth longest, grooved. Philippine Islands. 



1. Hologerrhum philippinum. 



Brown, with a few black oblong spots on the anterior part of 

 body. 



a. Philippine Islands. From Mr. Cuming's Collection. 



Description of the specimen. — Habit like Coronella Icevis : body 

 moderate, rounded; tail moderate, tapering, not distinct from 

 trunk ; head depressed, with flat crown, not very distinct from 

 neck, with rather short muzzle, obtuse in front ; eye moderate, 

 pupil elliptical, erect. Rostral shield moderate, reaching the 

 surface of crown ; anterior frontala moderate, not bent on the 

 sides ; posterior ones small, rounded behind, bent on the sides ; 

 vertical nearly three times as long as broad, with straight, nearly 

 parallel outer edges, and an acute angle behind; occipitals mode- 

 rate, forked. Superciliary moderate ; anterior and posterior ocu- 

 lars two; one square loreal ; nasal not separated, but grooved, 

 anterior division pierced by the nostril; eight upper labials, third, 

 fourth and fifth forming the lower edge of eve ; seven temporal 



