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New Species of Land Snail from California. 



XXVI. — Description of a New Species or Variety of Land Snail 

 from California. 



BY ROBERT E. C. STEARNS. 

 Read October 20th, 1879. 



Helix, variety circumcarinata, Stearns. 



Shell widely umbilicated, discoidal, flattened, angulated, with a peripheral 

 keel ; whorls six to six and a half, slightly tabulated near the sutures, which 

 latter are deeply impressed ; surface finely granulated, varying in different 

 specimens ; and otherwise sculptured by conspicuous subacute ribs parallel 

 with the lines of growth both above and below, which meet, and sometimes 

 cross, the peripheral keel ; these ribs are more or less irregular and uneven, 

 of varying prominence, and are also unequally spaced, being closely crowded 

 in some places and farther apart in others. Aperture obliquely subangulate, 

 semilunate ; peristome moderately thickened, reflected somewhat, covering 

 the open umbilicus, and made continuous by a connecting thin deposit of 

 callus on the labium. Color, in some specimens, dingy white to white, in 

 others a dingy reddish white, ornamented with a double revolving band, — 

 the upper stripe being whitish, the lower reddish or light chestnut just 

 above, and contiguous to the peripheral keel ; the pinch or fold of the keel 

 taking up what in Helix Mormonum is the third or lower stripe of white. 



Number of specimens four, two adult and two immature, but nearly full 

 grown. 



Dimensions — Greater diameter, .92 to 1.01 inch. 

 Lesser " .75 to .86 " 



Height, .86 to .37 " 



Animal not observed. 



Helix, var. circumcarinata, Stearns. 



Habitat, Stanislaus County, near Turloch, California. 



For the specimens from which the above is written, I am in- 

 debted to Mr. A. W. Crawford, of Oakland, who has examples 



