44 MOLLUSCA FROM THE CRAG. 



least one third greater than the length ; the hinge line in this is more oblique, the 

 ligamental area broader and more shallow, with a smaller gape on both sides. Two 

 forms of the British shell have been figured by Professor Forbes in the ( Mag. Nat. 

 Hist.,' one of which is less elongated than the other, and more nearly approaches 

 our shell, but there is still apparently a sufficient difference to keep them separated. 



2. LIMA HIANS, Gmelin. Tab. VII, fig. 2, a c. 

 OSTREA HIANS. Gmel. Syst. Nat., p. 3332. 



Turt. ed. Linn., vol. iv, p. 273, 1806. 

 W. Wood. Ind. Test., p. 51, pi. 11, fig. 53, 1825. 



LIMA TENERA. Turt. Zool. Journ., vol. ii, p. 362, t. 13, fig. 2 (not tenera Chem.). 

 Brown. Illust. Conch. Gr. Brit., pi. 31, figs. 8, 9, 1827. 

 Forbes. Malac. Monen., p. 41, 1838. 



Id. Report on .Egean Invert., p. 182, 1843. 

 Phil. En. Moll. Sic., vol. ii, p. 56, pi. 16, fig. 3, 1844. 



INFLATA. Forbes. Malac. Monen., p. 41, 1838. 



SARSII. Kroyer, fide Loven. 



VTTRINA. Brown. Illust. Conch. Gr. Brit., pi. 31, figs. 10, 11. 



FRAGILIS. Flem. Brit. Ann., p. 388, (partly,) 1828. 



Id. Crouch. Corn. Faun., pt. 2, p. 37. 



APERTA. G. B. Sow. Thes. Conch., vol. i, p. 87, pi. 22, figs. 26 & 27, 1847. 



Thorpe. Brit. Mar. Conch., p. 249. 



HIANS. Loven. Ind. Moll. Scand., p. 32, 1846. 



Forb. and Hani. Hist, of Brit. Moll., vol. ii, p. 268, pi. 52, figs. 35, and 

 pi. R (animal), 1849. 



OBLONGA. S. Wood. Mag. Nat. Hist., New Series, vol. iii, p. 234, pi. 3, fig. 2, 1839. 

 LIM.E. Forbes. Mag. Nat. Hist., vol. viii, pp. 593, 594, figs/ 63 & 64, 1835. 



Spec. Char. Testa oblongo-ovatd, obliqud, valde incequilaterd, depressd, gracili, costato- 

 striatd, striis vel radiis numerosis, asperimis, irregularibus, cardine obliquo, area triangulari 

 latd t auriculis tsqualibus ; margine denticulate. 



Shell elongato-ovate, oblique, very inequilateral, depressed, and slender ; striated 

 with numerous, rough, irregular, and slightly waved striae, projecting beyond the 

 ventral margin ; gaping widely on the posterior side, slightly so on the anterior ; 

 ligamental area large and triangular, umbones prominent and distant. 



Height, 1 inch. Length, 6-10ths of an inch. 

 Locality. Cor. Crag, Ramsholt. 



Recent, Britain, Scandinavia, and Mediterranean. 



This appears more scarce as a fossil than the preceding, having as yet obtained 

 only two specimens, and those both of the same value, and from the same locality, 

 there is, however, little doubt of its identity with the recent British species. 



The form of this shell is comparatively much more elongated than the preceding, and 

 is somewhat natter ; it gapes widely on both sides, that on the posterior is particularly 

 deep immediately behind the hinge line, while the front gape is near the ventral 



