Shell with a covered or open umbilicus, turbinately depressly globose, whorls 5 a little convex, the last descending; suture well impressed; transverse striæ well and densely shown, longitudinal striæ fine and impressed; aperture rounded; peristome various (thin, acute, a little reflected, or heavy, with an interior thickening) approximate, with (or without) a profuse callus connecting the outer and inner lips; near the umbilicus the columellar lip expands so as to partially cover the perforation. _Hab._ San Clemente Island, Cal. Abundant. This shell, so difficult to describe, owing to its variable characters in different specimens, makes the nearest approach to _H. Kelletii_ Forbes, from which it may readily be distinguished by its sculpture and other characters. In size and the elevation of the spire, it is one of the most variable of the California species of Helix. Distinguished from _H. intercisa_ W. G. Binney, by its not being _solid_, having the umbilicus partially or completely _open_, and from the figure referred to, in being more depressly trochiform in shape. The locality of _H. intercisa_ is given as “Oregon Territory.” The shell varies in some minor particulars, as in the want of a rufous apex, and its not being of the same color; in other respects it seems to be a closely allied species. _Helix rufocincta_ Newc. State Collection, Species 624. H. testa depresso-globosa, cornea, rufo-unifasciata, umbilicata, sub-lente decussata-striata; anfr. 6 ultimus non descendens; apertura sub-rotundo, labio reflexo, albo; sutura impressa; columella non callosa. Diam. maj. 0.70, min. 0.60 pol. Alt. 0.40 pol. _Hab._ San Diego, et Insula “Santa Catalina,” Cal. Shell depressly globose, horny, red-banded, umbilicate, under the lens decussately striate; whorls 6, the last not descending; aperture sub-rotund; lip white, reflected; suture impressed; columella not callous. The adult of this species is allied in outline to _H. Pytyonesica_ Pfr., but is less elevated, and bears in other respects no especial relation to that species. The size varies considerably, and the umbilicus in some specimens is nearly closed, while in the typical specimens it is quite open. But one dead specimen was found at San Diego; but on Catalina Island it was more common, 19 adult and mostly living specimens occurring, æstivating on the under surface of stones, in June. _Helix Gabbii_ Newc. State Collection, Species 1097. H. testa sub-obtecte umbilicata, tenuis, pallide cornea, depresso-orbicularis, fusco obscure zonata; anfr. 5 convexis ultimus descendens; sutura bene impressa; apertura sub-orbiculari; labro albo non calloso, reflexo. Diam. maj. 0.40, min. 0.35 pol. Alt. 0.20 pol. _Hab._ Insul. “San Clemente,” Cal.