Shell sub-planulate above, yellowish horn color, sub-carinate, under the glass thickly granulate, hairy(?); whorls 6 very finely striate, striæ obliquely transverse; the last whorl descending; umbilicus broadly open; aperture lunate oval; lip thin, white and reflected, near the umbilicus expanded. REMARKS.—But one recent specimen, with a number in a fossil state, were collected by M. Voy and kindly placed in my hands. The granulated surface is confined to the epidermis, and the summit of many of the granules is marked with a cicatrix indicating a hirsute character. The nearest allied species is _H. Dupetit-Thouarsi_, from which it differs in its more depressed form and surface structure. It is dedicated to Wm. Hillebrand, M.D., of Honolulu, a well-known naturalist. _Helix Tryoni_ Newc. State Collection, Species 1098. H. testa solida, depresso-globosa, anguste obtecte umbilicata, supra cæruleo-cinerea, infra sordido-alba, spira sub-turbinata; anfr. 6 convexi, ultimus descendens; striæ sub-lente numerosæ insculptæ circum-volutæ; apertura sub-rotundata; columella callosa, obsolete unidentata; peristoma vix reflexum, introrsum callosum. Diam. maj. 1, min. 0.88 pol. Alt. 0.75 pol. _Var. b_, anfr. superiores undis transversis albis. _Hab._ Insulis “Santa Barbara,” et “San Nicolas,” Cal. Shell solid, depressly globose, umbilicus narrow and covered, above of an ashy sky-blue, below of a dirty white; spire sub-turbinate; suture well impressed, whorls 6 convex; numerous microscopical striæ, sculptured and revolving with the whorls; aperture rounded; columella callous, obsoletely one (sometimes two) toothed; lip scarcely reflected, thickened within; _var. b_, superior whorls with white transverse undulating lines. _Hab._ Santa Barbara, and San Nicolas Islands, Cal.[9] This species was found in great abundance alive. The animal is of a deep smoky hue, almost black, with _sometimes_ the terminal half-inch of the foot of a dirty white. It is dedicated to a distinguished American Conchologist. _Helix crebri-striata_ Newc. State Collection, Species 1036. H. testa obtecte vel aperte umbilicata, turbine-depresse-globosa, translucido-cornea; anfr. 5 convexiusculi, ultimo descendente; apice sub-mamillato; sutura bene impressa; striæ transversæ valde et creberrime insignæ, striæ longitudinis microscopice incisæ; apertura sub-rotunda; peris. diverso (tenue, acute, sub-reflexo, vel crasso intus calloso) approximato cum callo profuso conjuncto, vel sine callo; prope umbilicam expanso. Diam. maj. 0.92, min. 0-75 pol. Alt. 0-55 ad 0-80 pol. _Hab._ Ins. “San Clemente,” Cal.