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. 

 Loven. 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. 



Mailer. Ind. Moll. Grandl., p. 16, 1842. 



OSTREA NIVEA. Broc. Conch. Subap., p. 571, t. 14, fig. 14, 1814. 

 LIMA Risso. Europ. Merid., t. iv, p. 306, 1826. 



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

 Nyst. Rech. 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 ? Lovtn. Ind. Moll. Scand., p. 32, 1846. 



ELONGATA. Forbes. .ZEgean 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, cBquilaterali, fragili, convened, in medio striatd vel 

 costatd, striis rugosis, scepe obtuse angulatis, mediis binis verticalibus ; 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 costae rugose, sometimes 

 angulated ; hinge line straight ; auricles equal. 



Length, \ ; height, \ an inch. 



Locality. Cor. Crag, Sutton and Ramsholt. 



Recent, Britain, Norway, and the ^Egean 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. 



