72 HELIX. 



H. RUFOCINCTA, Newcomb. PI. 15, fig. 11. 



Narrowly umbilicated, rather thin, scarcely marked by growth 

 lines, and occasional revolving lines, horn color, with a narrow, white- 

 margined chestnut band ; whorls 5-6, flatly convex above, the last 

 descending in front, convex on the base ; peristome white, thickened, 

 reflected below. Diam. 17 mill. 



Catalina Island, California. 



H. ROWELLII, Newcomb. PL 15, figs. 12, 13. 



Moderately umbilicated, smooth, very slightly obliquely striulate, 

 and very minutely punctulate, somewhat shining, whitish, with a 

 single narrow chestnut band ; whorls 4i, somewhat convex, the last 

 descending in front and swollen, base subplanate ; aperture widely 

 circular, peristome white, expanded, extremities approaching and 

 joined by a callus. Diam. 20 mill. 



Lower California. 



H. Lohrii, Gabb, (fig. 13) is a synonym. 



H. SERIATISETA, Rochebrune. Unfigured. Cochin China. 



Referred to by its author to this group, of which it can scarcely 

 be a member. 



Subsection I, HELMINTHOGLYPTA, Ancey, 1887. 

 H. ARROSA, Gould. PL 16, fig. 17. 



Moderately umbilicated, rather solid, rugulosely malleated and 

 minutely granulated, reddish olive, or yellowish, with a superior, 

 narrow, dark chestnut band ; whorls 7, convex, the last a little de- 

 scending in front ; aperture bluish, with pellucid band ; peristome 

 flesh colored, shortly expanded, the base reflected. 



Diam. 34-40 mill. 



Coast of California jrom Sta. Cruz to Mendocino Co. 



Dr. Cooper has named two varieties Holderiana and Stiver siana ; 

 the varietal characters appear to be unimportant. Mr. Binney also 

 mentions an albino specimen. H. centginosa, Gould (not Pfr.) is a 

 synonym. 



H. TOWNSENDIANA, Lea. PL 15, figs. 14-16. 



Rather narrowly umbilicated, yellowish ahd brownish horn color 

 intermixed, with faintly impressed, minute longitudinal strise and 

 coarse oblique, malleated wrinkles ; whorls 6, flatly convex, the last 



