Hab. Ins. “San Clemente,” Cal.
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.