182 PROCEEDINGS OP THE ACADEMY OF 



CALLIRHINUS. 



Head and body colubriform. Snout subconical, protruding beyond the lower 

 jaws. Vertex plate elongated. Rostral convex. Two nasal plates with nostril 

 between them. Two loral plates. One anteorbital and two postorbitals. Third 

 and fourth upper labials entering into the orbit. Scales moderate, smooth. 

 Preanal scutella divided. Subcaudal scutellre disposed upon a double series. 



Calliehinus patagoniensis, — is the only species that has, so far, come to our 

 knowledge. The scales are disposed upon nineteen longitudinal series. The 

 ground color is olivaceous, maculated with black. 



Locality. — Coast of Patagonia. 



Another genus of non-venomous serpents, 



CANTORIA, 



is framed upon the following characters : Body subcylindrical, deeper than 

 broad, and very much elongated. Tail moderate, thick upon its base and coni- 

 cal posteriorly. Head depressed, continuous with the body. Mouth moderate. 

 Eye very small. An odd, narrow, prefrontal plate. Nasal plate unique (one 

 right and one left), situated upon the upper surface of the head. One loral. 

 Orbital plates constituting a complete circle around the eye. Scales moderate, 

 smooth, shining, disposed upon nineteen longitudinal series. Preanal scutella 

 divided. Subcaudal scutellae disposed upon a double series. 



The typical species of this genus is Coronella violacea, Cantor, Journ. Asiat. 

 Soc. xvii. 1847, provided our determination be correct. 



Locality. — A specimen of the above species was procured at Singapore. 



Next in order is a species closely allied to its congeners, and which we pro- 

 pose thus to characterise : 



Xenodon ancorus. — Two anteorbital and two postorbital plates. Dorsal 

 scales smooth, disposed upon seventeen longitudinal series. Brownish red 

 above, with transverse blotches along the back and an anchor-shaped spot upon 

 the head. Beneath unicolor. 



Finally, we institute amongst venomous serpents, the genus 



DOLIOPHIS, 



which may be recognised by a sub-cylindrical and very much elongated body; 

 the taiUpeing moderate. The head depressed, though continuous with the body. 

 Mouth moderate, provided anteriorly with two fangs on either side. Cephalic 

 plates normal. Two nasals, with nostrils between them. No loral plate. One 

 anteorbital. Third and fourt^ labials entering into the orbit. Two postorbitals. 

 Scales smooth, shining, disposed upon thirteen longitudinal series. Preanal 

 scutella entire. Subcaudal scutellre disposed upon a double series. 



DoLioPHis PLAvicEPS. — Eluj^s Jlaviceps, Cantor. Journ. Asiat. Soc. xvii. 1847, 

 is the only species so far known to us as belonging to this genus. 



Locality. — Singapore. 



[September 



