Notice of Land and Freslaoater Shells. 363 



Cooper are labelled, " both slopes of the Bitter Koot Mountains 

 from 5600 feet to 2200 feet." 



Ill Bitiney's Terr. Moll. 11. 162, the greatest transverse dia- 

 meter of Oregon examples, is said to be II inch. 



The following are tiie measurements of large and small speci- 

 mens from Dr. Cooper's shells. 



Diam. maj. 23, min. 20, x\lt. 13 mil. 

 " 17, " 131, " 9 " 



The small variety is generally more strongly and coar.-ely 

 wrinkled. 



Dr. Cooper in the Pacific R. R. Report, gives Pnget's Sound, 

 W. T., as a habitat of this species, — it has also been found at 

 Cape Disappointment, on the borders of Oregon and "Washing- 

 ton Territory. 



Helix ITIiillani, nov. sp, 



T. snbobtccte-iimbilicata, globoso-depressa, fusco-cornca, irrcgulariter 

 striata, epidermide temii, sub lente lineis spiralibus, et tnberculis (setos 

 gerentibus?) miinita, sub epidermide nitida ; spira brevi ; anfr. bh,-G 

 convexis, ultimo antice gibbo, vix descendcute, basi Iseviusculo, ad aper- 

 turain valde constricto ; apertura subtriangulari, obliqua, dente brevi, 

 albo, hnguiformi, in pariete aperturali intrante snbcoarctata ; perist. albo, 

 vel rufo-corneo, expanse, fornicatim reflexo, bidentato, dentibus duobns 

 albis in margine calli positis, 1 inferiore lamelliformi, altero, sa^pe obsolete, 

 parvo ; margine columellari umbilicum mediocrem pervium semioc- 

 cultante. 



Shell M^ith umbilicus partially covered, globose-depressed^ 

 dark horn colored, irregularly striated, having a thin epidermis 

 with microscopic spiral lines, and tubercles (the latter with 

 hairs?) ; beneath the epidermis shining; spire short ; whorls 5-| 

 to 6, convex, the last gibbous above, scarcely descending, the 

 base rather smooth, much constricted at the aperture ; aperture 

 sub triangular, oblique, with a short white linguiform parietal 



