WE NONA ISABELLA. H3 



labials. The temporal shields are numerous, small, scale-like. The 

 cleft of the mouth is slightly deflected. The upper labials are nine 

 in number ; the anterior three are larger than the rest ; the fifth is 

 broadest ; none reach the orbit. The lower labials are small ; the 

 anterior three being the largest ; the first pair on each side of the 

 symphyseal meet posteriorly, enclosing the latter. Three pairs of 

 mental shields may be seen along the middle region, immediately 

 behind the junction of the first pair of labials. 



The body is subcylindrical, deeper than broad ; the abdomen being 

 comparatively narrow. The tail is short, thick, blunt upon its extre- 

 mity. The scales are small, irregular, subelliptical or sub-lozengiform, 

 disposed upon forty-five longitudinal series, proportionally large in 

 the outer series, and deeper than long. In the second series the scales 

 are larger still than in the remaining ones, where they become uni- 

 formly small, scarcely diminishing towards the middle region of the 

 back ; on the tail, however, they are somewhat larger. The abdomi- 

 nal scutellae are two hundred and six, and the subcaudal ones, twenty- 

 seven in number. 



The ground color is of a uniform bluish-lead hue above, and yel- 

 lowish-white beneath. 



Loc. A specimen, a little short of eighteen inches, was collected 

 up Puget Sound, Washington Territory. 



Plate VII, fig. 1, represents Wenona plumbea, size of life. 

 Fig. 2, is a side view of the head. 

 Fig. 3, an upper view of the same. 

 Fig. 4, the head, seen from below. 

 Fig. 5, a front view of the same. 

 Fig. 6, the disposition of the scales. 



Fig. 7, the vent, with the preanal scutella, and the minute scales 

 surrounding it. 



2. WEXONA ISABELLA, B. & G. 

 (Plate VII, figs. 8-14.) 



CHAR. SPEC. Scutis frontalibus in dua paria dispo&itis. &uto loreo 

 angulare. Quarto et quinlo labialibus in orbitum productis. Scuto 



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