History of British animals - University of Guam Marine Laboratory

Nucula. MOLLUSCA. ARCADE. 4038. N. ovata Transversely ovate, rather depressed, obscurelystriatedtransversely lunette ; slightly impressed, cordate, elongated ; margin entire."—Mant. Suss. 94. t. xbt. £ 26, £7 —In Blue Chalk Marl.9. N. variabilis Transversely oval elongated, sometimes oblique, ratherdepressed, smooth ; beaks near one end—Sower. Min. Conch, t. cccclxxv.f. 2 In Oolite.10. N. lachryma Ovate, gibbose, smooth ; anterior side produced, pointed,convex above ; posterior side rounded—Soivcr. Min. Conch, t. cccclxxvi.f. 3—In Oolite.1 1. N. mueronata.— Subrhomboidal, rounded, convex, concentrically sulcated,anteriorly mucronated—Sower. Min. Conch, t. cccclxxvi. f. 4—In Oolite.12. N.fcjangulata.— Ithomboidal, concentrically striated ; most convex nearthe beaks ; front rounded.—Sower. Min. Conch, t. cccclxxvi. f. 5—In GreenSand.13. N. impressa Transversely oval, depressed, smooth ;beaks near oneextremity lunette ; deeply sunk, convex, elongated; edges entire—Sower.Min. Conch, t. cccclxxv. f. 3—Green Sand.14. N. antiquata Triangular, rounded, gibbose, antiquated, longitudinallystriated ; lunette heart-shaped, sunk ;margin toothed—Sower. Min.Conch, t. cccclxxv. f. 4.—Green Sand.15. N. ovum Transversely obovate, ventricose, smooth, anteriorly pointed.—Sower. Min. Conch, t. cccclxxvi. f. 1.— Lias.16. N. ventricosa.— Concentrically sulcated ;anterior side rounded; posteriormuch produced, attenuated ; upon the posterior slope is a broad concavearea, bounded by two ridges that run from the beak to the extremity sulci;fine Sower. Min. Conch, t. cccclxxvi. f. 2 In Oolite ? Northamptonshire,17. N. deltoidea Triangular, inflated ; posterior side obliquely truncated,flat, pointed ; anterior side short, rounded—Sower. Min. Conch, t. Dliv. f. 1.— Upper Marine Formation, Isle of Wight.18. N. inflata Nearly globular, smooth ; the posterior side produced,compressed, pointed Sower. Min. Conch, t. dIv. f. 1.— London Clay.19. TS.undulata.— Globular, concentrically undulated ; posterior side produced,contracted, pointed Sower. Min. Conch, t. Dliv. f. 3.—Chalk Marl.20. N. amygdaloides Transversely elliptical, elongated and sulcated, compressed; sides equal.— Sower. Min. Conch, t. Dliv. f. 4.— London Clay.21. N. palnus Transversely elongated, very convex, shining; extremitiesrounded, equal ; beaks nearly central.— Sower. Min. Conch, t. cccclxxv.f. 1 Carboniferous Limestone.22. N. attenuala— Transversely elongated,ventricose ;one end shortrounded ;the other produced, with a broad concave area, elevated in themiddle along the joint ; the whole covered with regularfine concentric ribs,or striae. Like the last in form—Multarticulate Cockle, lire, ltuth 310,t. xv. f. 5.— In slate-clay of the Independent Coal Formation.23. N. gibbosa — Transversely ovate, ventricose, beaks incurved near oneend, the other slightly produced and obtuse ; obsoletely furrowed concentrically,with irregular distant grooves.—Multarticulate Cockle, lire, ltuth.310,— t. xv. f. 6. In Slatc-clay of the Independent Coal Formation.cc 2