THE RED-BANDED SNAIL. 137 



surface is marked by very many microscopic, spiral 

 lines, which are crossed by roughened ridges. Diam- 

 eter one inch or more. 



A smaller variety, named ptycophora^ Brow n, 

 ti-kof -o-ra, is found in Idaho and Eastern Oregon. 

 The shell is thin, nearly smooth, and is of a light 

 horn-color, but it has the regular markings and the 

 broad white peristome of the normal specimens. 



Helix {Ariontd) ruficincta^ Newcomb, ru-fi-sink^-ta. 



This species has a small, smooth shell with a low 

 spire. The whorls number five or six, the umbilicus is 

 distinct, and the peristome is white, rounded, and 

 conspicuous. The shell is of a light horn-color, with 

 a distinct, reddish brown band. It lives on Santa 

 Catalina Island. 



Quite similar to the above but smaller, is Helix 

 {Ario?ita) Gabbi^ Newcomb, from the three islands tak- 

 ing their names from the three saints, Santa Barbara, 

 San Clemente and San Nicolas. I have seen a little 

 Helix, called the "Holy Snail," because it lived its 

 little life in Palestine; but if names are good indica- 

 tions, what an odor of sanctity there ought to be around 

 our X\\.W^ Helix Gabbi. But alas! even a holy name does 

 not change the one who receives it, and so with these 

 islands and the mollusks which live upon them. 



The shells of this species are about the size of 

 large peas, being nearly smooth, with a more or less 

 elevated spire and a rounded peristome. The shade 

 varies from white to horn-colored, and a brown band 

 is generally present. 



Helix facta^ Newcomb, is but a variety of the same 

 species, and Mr. Hemphill considers them all but 

 varieties of ritficincta. 



