HELIX. 171 



DESCRIPTION. 



Animal slender, tentacles much elongated. Color 

 pale ferruginous, viith a lilac tint, darker on the neck. 

 Whole surface, even the tentacles, marked with coarse, 

 elliptical granules, in longitudinal series ; no marginal 

 border. 



Shell depressed, about equally convex above and 

 beneath, with a very small umbilicus partially covered 

 by the lip ; yellowish horn-color. The epidermis is 

 strong, and everywhere hispid with very fine, short, 

 shining hairs, closely arranged in lozenge, so that the 

 principal lines seem to run diagonally to the axis of the 

 shell. When denuded of the hairs, the hnes of growth 

 are found to be scarred, at regular distances, with trans- 

 verse elevations, on which the hairs were seated. 

 Whorls six, the last one increasing very rapidly near 

 the aperture, having nevertheless a deep constriction 

 directly behind the lip. Aperture more than usually 

 vertical, narrow lunate. Lip white, widely reflected, 

 flexuous in its course, not decidedly flattened. Throat 

 pale violet or shghtly livid. 



Diameter over three-fifths of an inch ; axis two-fifths 

 of an inch. 



Geographical Distribution. Found in Oregon, 

 at Astoria and Fort George, on the Columbia River, by 

 the naturalists of the U. S. Exploring Expedition. 



Eemarks. This, like the preceding, is another shell 



