146 EOCENE MOLLUSCA. 
lateral ; costated with 15 to 18 sharp, elevated, and somewhat distant ribs; lunule large, 
smooth, depressed ; beaks prominent, slightly incurved ; hinge very thick. 
Diameter, 1}th of an inch. 
Locality. Lyndhurst (J. Sowerby); Brockenhurst (Zdwards). 
Belgium: Hoesselt, Vliermaet, and Lethen (/Vys?). 
This is a handsome shell, and it is more readily distinguished than the generality of 
species in this genus; its deltoid form and great elevation of umbo are its most prominent 
features. The costa are distant, especially towards the pedal region, triangular in shape, 
with broad interspaces ; the top of the rib is small, not sharp, rather flattened, but 
narrow ; the hinge is broad in consequence of its elevated umbo, teeth large, and the’ 
muscle-marks deeply impressed. It is, I am told, abundant at Brockenhurst, where 
the valves are frequently found united. In Morris’s ‘ Cat. Brit. Foss.’ it is quoted from 
Barton, but I have not seen it from that locality. 
8. Carpita ELEGANS, Lamarck. ‘Tab. XXII, fig. 16, a, 6. 
VENDPRICARDIA ELEGANS, Lam. An. du Mus,, t. vii, p. 59, No. 10, and t. ix, pl. 32, 
fig. 3, a, 6. 1807. 
— _— Desh. Hist. des An. des Env. de Par., t.i, p. 157, pl. 26, 
figs. 14—16. 1824. 
CaRDITA _— Nyst. Coq. foss. de Belg., p. 215, pl. 17, fig. 2, 1843. 
a — J. Sow. In Dixon’s Geol. of Suss., p. 169, pl. 3, fig. 15. 
1850. 
— — Desh. An. sans Vert. du Bass. de Par., t. i, p. 772, 1859. 
Spec. Char. C. “ Testé subrotundd, depressiusculd, tenué costatd; costis numerosis, 
compressis, eleganter squamosis ; lunuld ovato-lanceolatd.” (Deshayes.) 
Shell somewhat rounded and slightly depressed, with numerous ribs, thin, compressed, 
and elegantly ornamented ; lunule ovately elongated. 
Diameter, ths of an inch. 
Localities. Bracklesham, Stubbington (Edwards). 
France: Grignon, La Montagne de Laon, Soissonais (Deshayes). 
Belgium: Foret, Laeken (Vys?). 
This species is by no means rare in England, and I believe it is also abundant in 
France ; it much resembles the young state of C. imbricata, but our present shell never 
attains to the magnitude of that species; it differs in being rather more tumid, and 
there is also a slight difference in the coste, which in this species are less numerous, 
varying from 17 to 20; there is likewise a greater interspace between the ribs, and the 
ribs themselves are more nodulous than they are in ambricata. 
There is a variety from Bramshaw, in which the ribs are sharper and higher (var. 
subelegans). 
