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—e. 
OsTREA HIANS. Gmel. Syst. Nat., p. 3332. 
— — Turt. ed. Linn., vol. iv, p. 273, 1806. 
— —_ W. Wood. Ind. Test., p. 51, pl. 11, fig. 53, 1825. 
Lima TeENERA. Turt. Zool. Journ., vol. ii, p. 362, t. 13, fig. 2 (not tenera Chem.). 
= — Brown. Illust. Conch. Gr. Brit., pl. 31, figs. 8, 9, 1827. 
— _ Forbes. Malac. Monen., p. 41, 1838. 
— —_ Id. Report on Aigean Invert., p. 182, 1843. 
— — Phil. En. Moll. Sic., vol. ii, p. 56, pl. 16, fig. 3, 1844. 
— «nriata. Forbes. Malac. Monen., p. 41, 1838. 
— Sarsit. Kroyer, fide Lovén. 
— virrina. Brown. Illust. Conch. Gr. Brit., pl. 31, figs. 10, 11. 
— FrRaaiLis. 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, pl. 22, figs. 26 & 27, 1847. 
— Thorpe. Brit. Mar. Conch., p. 249. 
— utans. Lovén. Ind. Moll. Scand., p. 32, 1846. 
— — Forb. and Hanl. Hist. of Brit. Moll., vol. ii, p. 268, pl. 52, figs. 3—5, and 
pl. R (animal), 1849. 
— osionca. S. Wood. Mag. Nat. Hist., New Series, vol. iii, p. 234, pl. 3, fig. 2, 1839. 
Limz. Forbes. Mag. Nat. Hist., vol. viii, pp. 593, 594, figs. 63 & 64, 1835. 
Spec. Char. Testa oblongo-ovatd, obliqua, valdé inequilaterd, depressd, gracili, costato- 
striata, striis vel radiis numerosis, asperimis, irregularibus, cardine obliquo, area triangulari 
latd, auriculis equalibus ; margine denticulato. 
Shell elongato-ovate, oblique, very inequilateral, depressed, and slender; striated 
with numerous, rough, irregular, and slightly waved striz, projecting beyond the 
ventral margin; gaping widely on the posterior side, slightly so on the anterior ; 
hgamental 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 flatter ; 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 
