BIVALVIA. 47 



additional security against any injurious lateral movement of the valves. It 

 appears to differ from L. plicata of the Touraine Beds in not being so elongated, 

 and in having a broader ligamental area ; and from L. obliqua, of the Paris Basin, in 

 somewhat similar characters. 



5. Lima subauriculata, Montague. Tab. VII, fig. 3, a — c. 



Pecten subauriculata. Mont. Test. Brit. Sup., p. 63, t. 29, fig. 2, 1808. 



— — Flem. Edinb. Ency., pi. 205, fig. 12. 

 Ostrea subauriculata. Turt. Conch. Diet., p. 131, 1816. 



— — W. Wood. Ind. Test. Suppl., pi. 2, Ostrea, fig. 5. 

 Lima — Turt. Brit. Biv., p. 218, 1822. 



— — Flem. Brit. An., p. 388, 1828. 



— — Thorpe. Brit. Mar. Conch., p. 114, 1844. 



— G. Sow. Thesaur. Conch., vol. i, p. 84, pi. 22, fig. 23. 



— — Phil. En. Moll. Sic, vol. ii, p. 56, 1844. 



— — lovin. Ind. Moll. Scand., p. 32, 1846. 



— — Alder. Cat. of Moll. North, and Durh., p. 78, 1848. 



— — Forb. and Hani. Hist, of Brit. Moll., vol. ii, p. 263, pi. 53, 



figs. 4, 5, 1849. 



— sulcata. Brown. Illust. Conch. Gr. Brit., pi. 31, figs. 4, 5, 1827. 



— — Moller. Ind. Moll. Groendl., p. 16, 1842. 

 Ostrea nivea. Broc. Conch. Subap., p. 571, t. 14, fig. 14, 1814. 

 Lima — Risso. Europ. Merid., t. iv, p. 306, 1826. 



— — Desh. in Lyell's Princ, 1st ed, vol. ii, App., p. 12, 1833. 



— — Nyst. Kech. Coq. Prov. d'Anv., p. 17, 1835. 



— — Phil. En. Moll. Sic, vol. i, p. 78, 1836. 



— — Nyst. Coq. Foss. de Belg., p. 281, pi. 21, fig. 4, 1844. 



— sulculus ? Loven. Ind. Moll. Scand., p. 32, 1846. 



— elongata. Forbes. iEgean Invert., 1843, Rep. Brit. Assoc, p. 192. 

 Limatula subauriculata. S. Wood. Mag. Nat. Hist., New Series, vol. iii, p. 236, pi. 3, 



fig. 6, 1839. 



— — Morris. Cat. of Brit. Foss., p. Ill, 1843. 



Spec. Char. Testa elongato-ovali, ceguilaterali, fragili, conveccd, in medio striata vel 

 costatd, striis rugosis, scepe obtuse angulatis, mediis binis verticalibics ; cardine recto ; auriculis 

 aqualibus. 



Shell elongato-ovate, equilateral, convex, fragile, and closed all round ; costated or 

 striated in the centre, becoming obsolete at the sides ; striae or costse rugose, sometimes 

 angulated ; hinge line straight ; auricles equal. 



Length, \ ; height, ^ an inch. 



Locality. Cor. Crag, Sutton and Ramsholt. 



Recent, Britain, Norway, and the iEgean Sea. 



Small specimens of this species are by no means rare in the Coralline Crag at 

 Sutton ; this place and Ramsholt are the only two localities from which it has as yet 

 been obtained ; and there is no doubt about its identity with the recent British species. 



