History of British animals - University of Guam Marine Laboratory

362 MOLLUSC. PECTINIBRANCHIA. Haliotis.haliotime.Gen. LXXXV. HALIOTIS.— Left margin of the shellpierced by a row of holes.357. H. tuberculata.— Ovate-oblong, spirally striated withirregulartransverse folds.Auris marina major, List. Conch, t. Dcxi. f. 2.—Hal. tub. Linn. Syst.i.1256. Mont. Test. Brit. 473.— On rocks at low water-mark at Guernseyand Jersey ; rarely thrown ashore on the southern coasts ofEngland.Length from three to four inches, breadth from two and a quarter tothree inches ;strong, opake, brownish on the outside, beautifully iridescentwithin ; apex with a single spiral turn, slightly produced ; outer lip thin,inner lip thickened, inflected, and smooth. Animal with the sides ornament,ed with filaments, some of which pass through the holes in the shell ; hoodemarginate, proboscis with two corneous cheek-plates, and a narrow spinoustongue.CREPIDULIDiE.Gen. LXXXVI. CALYPTREA— Shell conical, with acentral subspiral apex ; cavity with a restricted subspiralplate.358. C. chinensis.— Shell depressed, apex central, blunt, witha single whorl ;unequally striated spirally.Patella rotunda, List. Conch, t. Dxlvi. f. 39—P. chinensis, Linn. Syst.i.1257 P. albida, Don. Brit. Shells, t. 129—P. chin. Mont. Test. Brit.489. t. xiii. f. 4.— West coast of England and Dublin Bay, on oysters.Breadth jjths, height |ths, brownish-white ; widely conical surface ; roughwith short concave scales ; inside smooth and glossy ; the spiral striae markthe direction of the growth of the shell.EXTINCT SPECIES.Mr Parkinson has figured a shell from the Crag of Essex (Organic Remains,iii. 52. t. v. f. 10.), which he considers as agreeing with Lister's Pa~tclla rotunda. " It forms a depressed cone, with a circular base and mammillaryapex." Some specimens from Harwich " had their upper parts completelyinvested with a mineralized sponge, or alcyonic mass."Gen. INFUNDIBULUM.—Shell conical, with a spiral groovemarking the whorls ; aperture orbicular, with a regulardecurrent spiral plate occupyingthe cavity.1. I. rectum Conical, concentrically striated ; apex central, acute, turnsof the spire obsolete ; plate rectangular ; pillar slender.—S'twer. Min. Conch.t. xcvii. f. 3 In Crag at Holywell.