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Show 698 MR. J. BRAZIER O N SEVEN N E W SPECIES O F HELIX. [NOV. 21, simple, thin, acute; margins approximating, right very little basal margin recurved and reflected. Diam. maj. 4_, min. 4, alt. 3 lines. Hab. Near Hobart Town, Tasmania. This species I have named after my friend and fellow voyager Mr. William Flood, R.N., late of Her Majesty s Steam-ship Curacoa.' 6. HELIX (VIDENA) MILLIGANI. Shell umbilicated, discoidal, thin, closely and accurately ribbed; interstices striated with fine granular-like lines, not shining pale horny green • spire depressed, suture very little impressed ; whorls 4 =>, natly convex last large, inflated, convex, base striated the same as the upper surface; umbilicus deep and wide, sugarloaf-shaped, with the striae running into it; aperture oblique, lunately ovate; peristome simple, thin, acute, straight; margins rather distant, right expanded, columellar margin recurved a little over the edge of the umbilicus. Diam. maj. 5, min. 4^, alt. 2\ lines. Hab. Mount Wellington, Tasmania (Petterd). Named in honour of Dr. Milligan, whose indefatigable exertions in the cause of science have made us acquainted with many new and rare Tasmanian shells. 7. HELIX (VIDENA) PASCOEI. Shell umbilicated, discoidal, obliquely closely and very finely ribbed, spirally striated, the interstices as seen under the lens with fine silky stri_e, not shining, dark reddish horny ; spire quite flat, suture furrowed ; whorls 4\, nearly flat, last large, roundly convex ; base light brown, convex, sculptured the same as the upper surface; umbilicus deep and narrow, with the striae running into it; aperture diagonal, ovately lunate; peristome simple, thin, acute, regular; margins rather approximating, right scarcely expanded, basal margin not reflected. Diam. maj. 4, min. 3, alt. 1\ lines. Hab. Near Hobart Town, Tasmania (Petterd). This species is quite flat, like a Planorbis, with the suture furrowed or deeply indented. 8. PALUDESTRINA LEGRANDIANA. Shell elongately conical, thin, semipellucid, greenish horn-colour under a dark epidermis ; whorls 6-1, somewhat flattened, the last three keeled below the suture, and furnished with small, solid, stunted, hair-like spines (as seen under the lens) of a bright transparent horn-colour, flattened on the top ; aperture ovate, margins continuous, thickened, outer lip reflected. Length 2\ lines, breadth 1\ line. Hab. Salmon-ponds, New Norfolk, Tasmania (Legrand). This species is allied to Paludestrina salleana, Fischer, from Auckland, New Zealand. |