WENONA. 139 



Genus IV E !¥ © !¥ A, Baird & Girard. 



Gen. Char. Head small, conical, slightly swollen on the tempo- 

 ral region, though not separated from the body by a contracted neck. 

 Snout protruding beyond the lower jaw. Mouth moderately cleft. 

 Eyes very small. A broad and short vertical 3 two or three pairs of 

 frontals. Occipitals very small, the size of the superciliaries. One 

 nasal, a posterior one; nostril between it and the prefrontals, which 

 extend over the place occupied elsewhere by the prenasal. Loral 

 united with postfrontals or separated. One very large anteorbital ; 

 two or more postorbitals. Numerous small temporal shields. Scales 

 very small, lozenge-shaped, smooth, in 45 dorsal rows. Postab- 

 dominal scutella not divided. Subcaudal all entire. Unicolor. 

 Tail proportionally short, stout, terminating blunt. 



Syn. Wenona, B. & G. Proc. Acad. Nat. Sc. Philad. VI, 1852, 176. 



1. Wenona plumbea, B. & G. — Uniform bluish lead-color above ; 

 uniform yellowish white beneath. Three pairs of frontal plates. Middle 

 pair united with the loral, and thus extending to the labials. Labials not 

 entering into the orbit. Dorsal scales in 45 rows. 



Syn. Wenona plumbea, B. & G. Proc. Acad. Nat. Sc. Philad. VI, 1852, 176. 



Upper surface of head slightly convex, snout rounded and promi- 

 nent. Vertical plate as broad as long, obtuse angled anteriorly, 

 rounded posteriorly. Postfrontals small and triangular, the smallest 

 of all the frontals. Middle frontals subangular, transversely elon- 

 gated, reaching the labials at the commissure of the 2d and 3d, 

 occupying the place of the loral. Prefrontals angular posteriorly, 

 rounded anteriorly, reaching the first labial, and occupying the 

 place of the prenasal. Rostral broad and large. Postnasal subtri- 

 angular, elongated, apex directed backwards. Nostril vertically 

 elongated, situated between the lateral expansion of the prefrontals 

 and the postnasal. Occipitals quite small, and united in one plate, 



