26 EOCENE MOLLUSCA. 
on the siphonal region, like the character generally given for Gryphea, and on the tablet 
of Dr. Bowerbank’s specimen was written the name of Gryphea; I cannot see any- 
thing to distinguish it generically from Os¢rea, except the very small place of attachment, 
which of itself is insufficient. 
12. Osrrua InFLATA? Deshayes. Tab. VII, fig. 4. 
OstREA INFLATA. Desh. Coq. Foss. de Par., t. i, p. 359, pl. 58, figs. 4, 5, and pl. 59, 
figs. 1, 2, 1825. 
— —— J. Sow., in Dixon’s Geol. of Suss., p. 95, t. iv, fig. 7, 1850. 
— _ Morris, Catal. Brit. Foss., p. 174, 1854. 
Spec. Char. ‘‘O. testé ovato-deformi, profunda, gibbosd ; valvd inferiore rariplicata ; 
umbone angusto ; fossuld ligamenti angustd, marginibus superné crenatis.” 
Shell deformedly ovate, deep, inflated (?), lower valve with few radiating ridges, 
umbones sharp, ligamental area narrow, superior margins crenulated. 
Longest Diameter, 15 inch. 
Localities. Bracklesham (#dwards). 
France, Valmondois (Des/ayes). 
This is not at all a satisfactory species. I have only two or three specimens from 
Mr, Edwards’s cabinet that appear to correspond with the above diagnosis of M. Deshayes, 
They are left valves, and have adhered, near the margin of the shell, to some cylindrical 
body; they are by no means “inflated,” but shallow. The shell figured by M. Nyst, under 
this name, appears to be very different from the British specimens. 
13. Ostrea LoncrrosrrRis, Lamarck. Tab. VI, fig. 4. 
Ostrra LoNGrrostris. Zam. An. du Mus., t. 14, pl. 21, fig. 9. 
— — Desh. Coq. Foss. de Par., t. i, p. 351, pl. 54, figs. 7, 8; pl. 60, 
figs. 1—3; pl. 61, figs. 8, 9; pl. 62, figs. 4, 5; and 
pl. 63, fig. 1. 
— — J. Sow., in Dixon’s Geol. of Sussex, p. 174, t. iv, fig. 4, 1850. 
— — Morris. Catal. Brit. Foss., p. 175, 1854. 
= — Desh. Hist. des An. sans Vert. du Bass. de Par., t. ii, p. 110, 1860, 
Spec. Char. O. testé diversiformi, ovato-rotundatd, vel elongato-irregulari ; foliaced, 
rugosa, incrassatd ; striis lamellosis transversis instructd ; valvd inferiore profundd ; umbone 
longissimo, canaliculato, irregulariter contorto, acuto, trigono, tenué-striato vel sulcato ; 
fossuld utroque latere marginatd. 
Shell variable, ovately rounded, or clongately irregular, foliaceous, rough, and very thick ; 
inferior valve deep, with a very elongated ligamental area strongly marked with transverse 
striz or lines of growth. 
