History of British animals - University of Guam Marine Laboratory

258 MOLLUSCA. PULMONIFERA. Cyclostoma.Cochlea cinerea, List. An. Ang. 119, Conch, t. xxvii. f. 25—Nerita elegans,Mull. Hist. Verm. ii. 177 —Turbo tumidus, Penn. Brit. Zool.iv. p. 128 Turbo elegans, Mont. Test. Brit. 343.— Cycl. el. Drap.Moll. 32 Under moss and the roots of ferns, England.Length of the shell upwards of half an inch, brownish, spiralstriae distinct;a minute pillar cavity ; lid diverging,striated. The animal is brownish,with a long emarginate "snout. Some details of anatomical structure aregiven by Lister, Tab. Anat. iv. f. 1, 2, 3.53. C subcylindricum.— Whorls 4 to 5, cylindrical, summitobtuse, with numerous rounded transverse ridges.Helix subcylindrica, Pultney's Dorset. 49—C. truncatulum, Drap. Moll.40 On marsh plants.Length of the shell a quarter of an inch ; colour brown, mouth ovate, peristomethick, pillar cavity indistinct : summit as if truncated, ending suddenlyin a small smooth button-like whorl. The animal, according to Draparnaud,is white, transparent, with a long contractile snout : tentaculashort, little acuminated ; eyes above the retral base of the tentacula ;footshort ; lid thin, semioval, with bent strise. Dr Pultney found his on " waterplants in rivers and ponds." Draparnaud states, that it is found on the shoresof the Mediterranean, on the borders of marshes, on the earth among plants,and even burried in sand ; and expresses a suspicion that itmay prove a marineshell. In 1 80G I found a specimen in the cavity of a dead Spatanguspurpureus from the Frith of Forth. This species is probably the " Buccinumexiguum rufum quinque orbium" of List. Conch. 22. f. 19.— Donovan, inhis Brit. Shells, t. lxxx, figures this species, by mistake, for Pupa muscorum.EXTINCT.Gen. HELECINA.— Peristome entire, with a callous pillar.1. H. compressa — " Spire flatfish, an elevated thread surrounding the upperpart. Mouth a — little angular above." Sower. Min. Conch, t. x. threemiddle figures In Lias limestone, Leicestershire.2. H. expansa — " Carinated ; above, depressed, conical, obscurely striated ;beneath, ventricose; callus expanded." — Sower. Min. Conch, t. cclxxiii. f. 1-3.— Blue Lias at Lyme.3. H. solarioides— " Subdiscoid, obtusely carinated ; whorls depressed a-bove, convex beneath."— Sower. Min Conch, t. cclxxiii. f. 4—In Lias.4. H. polita— Subdiscoid, polished ; spire elevated, acute ; volutions markedwith an impressed band, depressed above, below ventricose ; callous, thin,expanded ; aperture nearly square —Sower. Min. Conch, t. cclxxxv At Copredy,in marly sandstone of the Lower Oolite.Gen. XVII. CAROCOLLA.— Shell carinated, mouth transverse,not reversed.54. C. lapicida.— Shell convex, transverselystriated ;peristomereflected, white.Cochlea pulla, sylvatica, spirisin aciem depressis, List. An. Ang. 127,Conch, t. 69. f. 68—Helix lap. Linn. Syst.i. 1241. Drap. Moll. iii.Mont. Test. Brit. 435.— Woods and old walls, England.