BIVALVIA. 33 



8. Pecten pusio, Pennant. Tab. VI, fig. 4, a — c. 



Lister. Hist. Conch., lib. iii, par. 1, figs. 9, 18? and 23? 1789. 

 Palliolum? Chem. Conch. Cab., vii, p. 333, t. dl , figs. 635-6, 1784. 

 OsTREA MiNiATA. Born. Mus. Cses. Vind., p. 104, t. vii, fig. 1, 1780. 



— MDLTISTEIATA. Poli. Test. SicU., vol. ii, p. 164, t. 28, fig. 14, 1795. 



— PUSIO. Bon. Brit. Shells, vol. i, pi. 34, 17;.'. 



— siNUOSA. W. Wood. Ind. Test., p. 50, pi. 10, fig. 34, 1825. 

 Pecten pusio. Penn. Brit. Zool., vol. iv, pi. 61, fig. 65. 



_ _ Turt. Brit. Biv., p. 215, pi. 17, fig. 2, 1822. 



— — Payr. Cat. Moll, de I'lle de Cors., p. 74, 1826. 



— — G. B. Sowerhy. Genera, No. 31, fig. 6. 



_ _ Phil. En. Moll. Sic, vol. i, p. 84, and vol. ii, p. 58, 1844. 



— — Forb. and Hani. Hist, of Brit. Moll., vol. ii, p. 278, pi. 50, figs. 4, 5 ; 



pi. 51, fig. 7. 



— DiSTORTUS. Da Costa. Brit. Conch., p. 148, pi. 10, figs. 3, 6. 



— — Mont. Test. Brit., p. 148, and Sup., p. 61, 1808. 



— — Loven. Ind. Moll. Scand., p. 30, 1846. 



— siNUOsus. Turt. Brit. Biv., p. 210, pi. 9, fig. 5, 1822. 



— — Brown. Illust. Conch. Gr. Brit., pi. 32, fig. 2, 1827. 



— — Forbes. Geol. Surv. of Gr. Brit., vol. i, p. 86, 1846. 



— SPINOSUS. Brown. Illust. Conch. Gr. Brit., pi. 33., fig. 8, 1827. 



— STEiATUs. J. Sowerby. Min. Conch., t. 394, figs. 2 — 4, 1823. 



— — Dujard. Mem. Soc. Geol. de France, t. ii, pi. 2, p. 270, No. 3, 1837. 



— — Nyst. Coq. Foss. de Belg., p. 301, pi. 15, fig. 1, b, b', d, 1843. 



— SERRATUS. Dubois. Conch. Foss. de Wolhyn. Pcdol., p. 73, pi. 8, fig. 5, 1831. 



— GLORIA MARIS? Id. - - - p. 72, pi. 8, figs. 6 & 19, 1831. 



— SQUAMULOsus. Desk. Bxped. Sci. de Morea, pi. 5, fig. 7 — 1 1, 1833. 



— LiMATUS. Gold/. Pet. Germ., vol. ii, p. 59, pi. 94, fig. 6, a — b. 



— — Chenu. Conch. Illust. Pecten, pi. 49, fig. 5. 



— ELONGATUS ? Gold/. Lac. cit., pi. 94, fig. 7, a — c. 

 HiNNiTES PUSIO. G. B. Sow., Jr. Conch. Man., fig. 173. 



— SINUOSUS. Desk. 2d ed. Lam., t. vii, p. 149, 1836. 



— — G.B. Sow., Jr. Thesaur. Conch., vol. i, p. 79, pi. 20, figs. 1—3, 1847. 



— IRREGULARIS. Desk. Ency. Meth. Vers., t. ii, p. 273, No. 1. 



Spec. Char. Testa orbiculato-ovatd, suhcBquivalvi, cequilateraK, radiatd, radiis confertis, 

 numerosis, 2 — 3 partitis, irregularibus, Icevibus aut scabris ; auricidis inaqualibvs. 



Shell orbiculato-ovate, subequivalve, equilateral with numerous close-set rays, in 

 sets of two or three, irregularly scabrous, with very unequal auricles. 

 Longitudinal diameter, 2 inches ; height, 2|ths of an inch. 

 Locality. Cor. Crag, Sutton, Ramsholt, and Sudbourn. 

 Red Crag, Sutton, Bawdsey, Walton Naze. 



Recent, Britain, Mediterranean, Bergen. 



This shell is abundant in both formations, and in the Coralline Crag at Ramsholt 



the two valves are often united. In the young state, the Crag shell so much resembles 



the recent specimens of the same size, that it cannot be considered otherwise than 



5 



