History of British animals - University of Guam Marine Laboratory

Cardium. MOLLUSCA. CARDIAD^E. 423— 440. C. kevhgatum. Shell subovate, the ribs obscure andobliterated anteally; covered with a brownish-olive glossy cuticle.Pectunculus subfuscus, List. Conch, t. cccxxxii C. laev. Linn. Syst.i.1123. Perm. Erit. Zool. iv. 91. t. lii. f. 40. Mont. Test. Brit. 80.Turt. Biv. Brit. 190.— An inhabitant of deep water, on various partsof the coast.Diameter about two inches ; slightly truncated retrally, and produced atthe anal angle ; ribs faint, depressed ; crossed by unequal furrows and stria? ;the shell, when young, is more produced, and of a uniformly greenish-yellow.— 441. C. serratum. — Shell ovate, lengthened, glossy, and apparentlysmooth.Pectunculus laevis, Test. Conch, t. ccxlix—C. ver. Linn. Syst.i. 1123.Turt. Biv. Brit. 192. t. xiii. f. 5—West of England and PentlandFrith.Length about an inch and a half, breadth a quarter less, white or yellowish,tinged with pink or orange retrally ; the longitudinal stria? are minute,the margin crenulated on the ventral, and serrated on the oral edge.442. C. edentulum. — Subovate, a single oblique tooth atthe hinge, with a lateral plate on each side.Mactra radiata, Don. Brit. Shells, t. clxi.— C. ed. Mont. Test. Brit.Sup. 29.—Found by Mr Laskey on Langston beach, near Portsmouth,after a severe storm in 1800.EXTINCT SPECIES.1. C. Hillanum.— Shell nearly circular, a little oblique, with numerousconcentric striae, retral edge straightish, longitudinally furrowed.—Sower.Min. Conch, t. xiv. upper fig.—Green Sand.2. C. riumstedianum— Subcordate, smooth, retral part longitudinally furrowed.—Sower. Min. Conch, t. xiv. middle fig.— Plastic Clay.3. C. nitens— Roundish, hind end rather shouldered ; smooth, shiningmarked ;all over with faintish longitudinal punctated lines, which are rathermore distinct at the retral side.— Sower. Min. Conch, t. xiv. lower fig.— LondonClay.4. C. Parkinsoni.— Gibbose, rather oblique, posterior side straightish; surfaceslightly rugose, with nearly forty longitudinal ribs, having slighttrausverserisings on each.— Sower. Min. Conch, t. xlix.— In Crag.5. C. Hibernicum.— Very broad and deep ; retrally truncated, concave, witha central eminence ; anteally elongated, beaks incurved, small ;striated longitudinally,the intervening spaces or ribs flat, with obsolete transversescales.— Sower. Min. Conch, t. lxxxii. f. 1, 2, and t. Dlii. f. 3.— In Grey WackoLimestone.0. C. alceforme — Triangular, ventricose, longitudinally ribbed ; retral sidetruncated, produced, near the hinge ; concentrically ribbed ; anteally produced,much compressed, ribbed.— Sower. Min. Conch, t. Dlii. f. 2— CarboniferousLimestone.7. C. proboscideum Suborbicular, gibbous; retral side straight, abouttwenty longitudinal rows of large canaliculated spines, with two rows oflesser ones between each— Sower. Min. Conch, t. clvi. f. 1.—In Green Sand.