SUPPLEMENT TO THE BIVALVIA. 15 
Length, ths of an inch ; heaght, ;isths of an inch. 
Localities. Britain: Hordle (S. Wood). 
France: Grignon, Ferme de l’Orme. 
This species is not very rare in the purely freshwater deposit of Hordle. It is very 
transverse in form, with a narrow hinge and elongated lateral teeth, in which characters 
only does it appear to differ from deperdita. It 1s also slightly inequilateral and some- 
what tumid, with a smooth exterior and a rather depressed umbo. 
20. Cyrena oBLIQUA? Deshayes. Tab. B, fig. 14. 
CyrENna oBttqua, Desh. Coq. Foss. des Env. de Par., t. i, p. 122, pl. 19, figs. 5, 6, 
1824. 
— optrauata, S. Wood. Lond. Geol. Journ., p. 118, 1847. 
Spec. Char. “ C. Testa ovato-transversd, obliqud, substriatd, sub-equilaterali ; umbo- 
nibus obliquis, productiusculis, dentibus cardinalibus tribus, valud dextrd, duobus, sinistra, 
lateralibus minimis ; latere antico levigato, postico tenuissime striato.”’ (Desh.) 
Length, 2sths of an inch; height, 3ths of an inch. 
Localities. Britain: Hordle (S. Wood). 
France: Soissons (Deshayes). 
A few specimens are in my cabinet, which appear to correspond with the French 
fossil which M. Deshayes originally constituted a distinct species in his first work on 
the fossils of the Paris Basin, and has preserved in his more copious and recent work, 
‘An. Foss. du Bas. de Par.,’ p. 506. This is the shell spoken of by me in the ‘ London 
Geol. Journal’ as oddiquata, and there regarded by me as a variety of deperdita and 
cycladiformis. Probably M. Deshayes’ suite of specimens of the three forms show 
greater differences than mine, and justify the separation. 
9]. Cyrena putcura, J. Sowerby. Tab. B, fig. 7 a, b. 
Cycrtas PULCHER, J. Sow. Min. Conch., t. 527, fig. 1, 1826. 
— pvuncura, Morris. Catal. Brit. Foss., 2nd edit., p. 200, 1854. 
— _ Forbes. Mem. Geol. Surv. (Isle of Wight), p. 148, pl. iii, fig. 1, 1856. 
CyrR—ENA = — J. Lowry. Chart Brit. Tert. Foss., pl. 11, 1866. 
= — 2 Sandberger. Land-Conch., p. 308, t. xx, figs. 1, 1 a, 1872. 
Spec. Char. C. Testa crassa, suborbiculari, subequilateralt, anticé paulo minore, 
postice dilatatd, obtuse angulatd, levigata vel trregulariter striata, umbonibus prominulis, 
cardine crassiusculo ; dentibus inequalibus, in valvd sinistrd duobus primis majoribus, in 
