n 



LAND AND FRESH-WATER SHELLS OF N. A. [PART L 



miJ'lle witli a che.stnut baud doubly edged with white, convex below; 

 umbilicus moderate, conical ; aperture very 

 oblique, ear-shaped, lunate ; peristome with a 

 white thickening, its ends converging, the 

 right very much arched, expanded, the colu- 

 mellar curved and sloping, reflected, expanded 

 above. Greater diam. 29, lesser 24A ; height 

 121t mill. 



Helix mormonum, Pfeiffeh, Proc. Zool. Soc. 

 lSr>7, 109 ; Mon. Hel. Viv. IV, 276.— 

 W. G. BiKNEY, Terr. Moll. IV, 16, pi. 

 Ixxix, f. 21. 

 Aglaja mormonum, Tryon, Am. Journ. Conch. 

 II, 314, pi. V, f. 14 (1867). 



Helix mormonum. 



Mormon Island, California ; San Joa- 

 quin Valley, north to Mt. Shasta {Neivcomh^). 



The specimens lately received from California, which appear 

 to be referable to this species, are singularly granulated on the 

 first one and a half apical whirls, and tiie epidermis of the next 

 two or three whirls is sparingly ornamented with small but very 

 distinct raised lines or points, something like prostrate hairs, 

 being part of and same color as the epidermis. 



Cat. No. 



No.ofSp. 



Localitv. 



From whom received. 



Remarks. 



Near Pitt River, Cal. 



Dr. J. G. Cooper. 



Fig. 300. Helix sequoicola, J. G. Cooper. — Shell 



umbilicated, globosely depressed, rather thick, 

 of a light chestnut color, lighter below, with a 

 band of darker color revolving above the middle 

 of the body-whirl, between two equal bands of 

 white; surface but sliglitly roughened by coarse, 

 irregular wrinkles of growth, often decussated 

 with coarse indented revolving lines, the upper 

 whirls with prominent, crowded, minute, isolat- 

 ed granulations, running in ridges or series in 

 an oblique direction to the wrinkles of growth ; 

 spire obtusely conic ; whirls six, but slightly 

 convex, the last more globose, slightly descend- 

 ing before ; umbilicus moderate, conical ; aper- 

 Helix sequoicola. ture very oblique, subcircular; peristome white, 



' Newcomb says (Pr. Cal. Ac. Ill, 119) that //. cultellata, Tbompson, is 

 identical with this species. It does not even belong to the same genus. 



