154 HELIX. 



H. JEJUNA, Say. PL 32, figs. 88-90. 



Perforate, nearly smooth, corneous ; whorls 5, the last large, with 

 convex base; peristome narrow, white, with a deep external groove 

 behind it, no teeth. Diam. 8 mill. 



Florida, Southern Georgia, Mobile, Ala. 



H. Mobilliana, Lea is a synonym. 



H. COLTJMBIANA, Lea. PI. 32, figs. 91-95. 



Depressed orbicular, closely hirsute, spire depressed conical, 

 suture well impressed ; whorls 6, the last rapidly increasing, very 

 convex, deeply constricted behind the lip and descending in front ; 

 aperture narrowly lunate, lip white, widely reflected, partly covering 

 the umbilicus; base very convex; yellowish horn color. 



Alaska, Oregon, California. 



This species sometimes developes a strong parietal tooth. H. labiosa, 

 Gould is a form of this species with very circular aperture and 

 widely reflected peristome. H. armigera, Ancey is another variety 

 more globose below and more densely hirsute than the typical form, 

 the peristome narrow, much less developed, parietal tooth usually 

 present. 



H. DEVIA, Gould. PL 32, fig. 96. 



Orbicularly depressed, rather thick, strongly obliquely striate; 

 spire convex, suture moderately impressed ; whorls 6, the last well- 

 rounded; aperture obliquely and transversely lunate, with a widely 

 reflected white lip, which is somewhat toothed at the. base, and 

 impinges on the open umbilicus, parietal tooth trigonal, oblique, 

 quite large ; dark horn color, nearly brown. Diam. 20 mill. 



Oregon. 



H. Baskervillei, Pfr. is a synonym. 



H. PTYCHOPHORA, A. D. Brown. PL 38, figs. 2, 3. 



Shell with almost concealed umbilicus, with distant coarse 

 striae, thick, dull russet color; whorls 5, convex, the last swollen 

 below, rapidly descending in front; aperture oblique, subcircular, 

 peristome white, thick, narrow, reflected, with a basal thickening, 

 scarcely toot-h-like, parietal wall with a thin callus. 



Diam. 19 mill. 



Montana, Idaho, Oregon. 



Var. MAJOR. With six full whorls, the umbilicus less concealed. 

 Diam. 22 mill. 



