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Show 1871.] MR. J. BRAZIER ON SEVEN NEW SPECIES OF HELIX. 697 I have very often received this species under the name of H. legrandi, Cox ; the species described by Cox is allied to H.juloidea, Forbes, which with Helix onslowi and II. rotella, Brazier, belong to the subgenus Charopa, whereas H. petterdi is quite distinct from any other known species from Tasmania. 3. HELIX (PITYS) ASSIMILIS. Shell widely umbilicated, subdiscoidal, thin, diaphanous, glassy, shining, regularly and obliquely finely ribbed throughout, interstices as seen under the lens finely striated, dirty brown; spire very little raised, apex obtuse, suture impressed ; whorls 5 to 5§, moderately convex, last convex, descending a little in front, base convex; umbilicus wide and moderately deep, rounded at the bottom ; aperture oblique, roundly lunate; peristome simple, straight, acute; margins rather distant, right very little expanded, columellar margin not reflected. Diam. maj. 1|, min. If, alt. f- line. Hab. Near Hobart Town, Tasmania (Petterd). This species differs from H. petterdi in being finely ribbed, and in having the interstices finely striated ; the preceding species is finely striated throughout with lines of growth, the interstices being scarcely perceptible. 4. HELIX (PITYS) SUBRUGOSA. Shell rather widely umbilicated, somewhat depressedly orbicular, thin, shining, reddish-horny, subrugosely and obliquely striated, the interstices much more finely striated ; spire very little elevated, apex obtuse, suture channelled; whorls 5|, moderately convex, last flattened above the periphery in form of a furrow, the groove being distinctly seen in front; umbilicus wide at the top, three fourths of the diameter, base convex, striated the same as the upper surface ; aperture nearly diagonal, subtriangularly ovate ; peristome simple ; margins distant, right straight, sloping and expanded, basal slightly thickened and reflected. Diam. maj. If, min. 1^, alt. 1 line. Hab. Near Hobart Town, Tasmania (Petterd). This beautiful little species I received from Mr. W . Petterd; it may be distinguished very easily by the bold projection of the ribs, and by the interstices being of finer sculpture ; the last whorl above the periphery is also depressed and has a furrowed appearance. 5. HELIX (VIDENA) FLOODI. Shell deeply and widely umbilicated, convexly depressed, thin, translucent, not shining, finely and irregularly striated with silky strise, and, as seen under the lens, minutely spirally striated, light horny green, nearly white; spire rather small, very little elevated ; whorls 5, moderately convex, last very large and inflated, roundly convex, not descending in front; base convex, striated the same as the upper surface; aperture diagonal, lunately rounded ; peristome |