History of British animals - University of Guam Marine Laboratory

Capulus. MOLLUSCA. CAPULID.E. 3632. I. obliquum.— Flatlish, smooth ; apex curved, adpressed, oblique ; internalplate two-thirds the diameter of the mouth, and reflected near the pillar.Sower. Min. Conch, t. xcvii. f. 1—London Clay.3. I. tuberculatum.— Gibbous, 'conical, oblique, rugosely tuberculated.—(Trochus apertus, Brander, t. i. f. 1, 2.) Soiver. Min. Conch, t. xcvii. f. 4, 5London Clay.4. I. echinulatum.— Gibbous, depressed, conical, oblique; apex acute,smooth; last turn obscurely echinulated.— Sower. Min. Conch, t. xcvii. f. 2.—Plastic Clay.— 5. I. spinulosum. Conical, apex acute, nearly central ; whorls obscure,surface covered with numerous short hollow spines or small tubercles.—Sower. Min. Conch, t. xcvii. f. 6.— London Clay.-Gen. CREPIDULA.— Shell oblong, widely conical, with adepressed marginal spiral apex ; aperture in part closed bya projectinghorizontal plate.1. C. sinuosa.— " Shell roundish oval, smooth, entirely milk-white ; withthe margin sinuate. Length half an inch ;breadth four-tenths. Found atScarborough in Yorkshire by Mr Bean. The outer surface is polished, and,under a glass appears to be very finely and irregularly striate transversely ;but it has no ribs, nor prickles, nor colourings of any kind."—Dr Turton,Zool. Journ. No. vii. 3G4. t. xiii. f. 5.(The editors of the Journal add, " Wecannot agree with Dr Turton in placing this Crepidula on the British list,as Mr Bean informed us that he took it from the bottom of a ship just arrivedfrom North America.")Gen. PILEOLUS.— Conical, a short internal spire ;aperturein part closed by a projecting horizontal plate with a crcnulatedmargin, and an opposed prominent lip.1. P. plicatus.— Obtusely conical, with diverging ridges extending to theedge ; margin irregularly crenated, the centre of the base divided.— Soiver.Min. Conch, t. ccccxxxii. f. 1-4.— In Oolite at AnclifFand Hinton.2. P. IcBvis.-— Shell rather flat, smooth, with an entire margin.— Sower.Min. Conch, t. ccccxxxii. f. 5-8.—Found along with the last.CAPULIMLGen. LXXXVII. CAPULUS.—Shell conical, with the apextowards the margin recurved and subspiral ;muscular impressionsemicircular ; foot complicated on its anteriormargin ;gills in a single series across the branchial cavity.—359- C. hungaricus.— Shell acuminated at the spiral apex,and diverginglystriated.The Fool's-cap, Borl. Corn. 276. t. xxviii. f. 4—Patella ungarica, Linn.i. Syst. 1259. Penn. Brit. Zool. iv. 143. t. xc. f. 147. Don. Brit.