108 CHLOROSOMA. 



Genus CIIIiOROSOlTIA, Wagl. 



Gen. Char. Head elongated, ovoidal, separated from the body 

 by a slender neck. Snout protruding. Cephalic plates normal. One 

 nasal plate, with the nostril in the centre. One loral. One ante- 

 orbital; two postorbitals. Eyes very large. Mouth deeply cleft. 

 Tail slender, between J and I of total length. Scales all perfectly 

 smooth. Postabdominal scutella bifid. Subcaudal all bifid. Uni- 

 color. 



Syn. Chlorosoma, Wagl. Nat. Syst. der Amph. 1830, 185. 



Clllorosoma vernalls, B. & G.— TJniform green, darker above, 

 lighter beneath. Dorsal scales in 15 rows. 



Syn. Coluber vernalis, Dekat, Mss. — Harl. Journ. Acad. Nat. Sc. Philad. 

 y, 1827, 361 ; and Med. & Phys. Res. 1835, 124.— Storee, Rep. Rept. Mass. 

 1839, 224.— HoLBR. N. Amer. Herp. Ill, 1842, 79. PI. xvii.— Dekay, N. 

 York Fauna. Rept. 1842, 40. PI. xi, fig. 22.— Thomps. Hist, of Verm. 

 1842, 117. 



Green Snake. 



Head proportionally long, ovoidal, slightly swollen on the tem- 

 poral region. Snout rounded and projecting considerably over the 

 lower jaw. The rostral plate shows but little from above. Outlines 

 of frontals rounded, prefrontals proportionally large, and more than 

 half the size of the postfrontals. Vertical hexagonal, elongated, 

 posteriorly more tapering than anteriorly; sides slightly concave. 

 Occipitals large, subangular. Superciliaries quite large, broader pos- 

 teriorly than anteriorly. Postorbitals two, subquadrangular ; lower 

 one resting on the commissure of the 4th and 5th upper labials. 

 Anteorbital angular above, rounded below, with anterior margin con- 

 vex. Loral angular, longer than high, and proportionally well de- 

 veloped. Nasal elliptically elongated, with nostril in the middle. 

 Three temporal shields, well developed ; anterior one elongated, 

 largest. Cleft of mouth curved or undulated. Upper labials 7; 



