166 EOCENE MOLLUSCA. 
Locality. Bracklesham Bay (Fisher). 
France: Grignon, Courtagnon, Chaumont (Deshayes). 
A single specimen is all that I have seen. It enriches the cabinet of, and was found 
by, the Rev. O. Fisher. The English specimen is the right valve, and it differs somewhat 
from the figure and description of the French shell, especially so from some specimens | 
have from Chaumont, which are much more gibbous or tumid, and broader or higher on 
the siphonal side. Our shell is also more rounded on the pedilateral margin than the 
French specimens. I feel unwilling to propose a new name, but, if some more specimens 
should confirm the great differences between the English fossils and those from France as 
being specific, I would call it C. Hisheri. M. Deshayes has figured a shell which he has 
called C. distincta. This is flatter than giédosu/a, and it has fewer and smaller ridges than 
those upon our specimen, which appears of an intermediate character. ‘This species is 
given from the nummulitic deposit m the province of Barcelona by M. Alex. Vezian, 
‘ Bull. de la Soc. Géol. de Fr.’, 2nd series, vol. xiv, p. 337. 
6. CrassateLta Grienonensis, Deshayes. Pl. XXIII, fig. 8 a, 6. 
CRASSATELLA GRIGNONENSIS, Desh. An. sans Vert. du Bass. de Par., p. 748, pl. xx, 
figs. 3—5, 1860. 
— compressa, var., J. Sow. In Dixon’s Geol. of Sussex, p. 88, pl. xi, 
fig. 21, 1850. 
Spec. Char. C.* Testdé transversd, ovato-trigond, inequilaterali ; antice obtusa ; pos- 
terius oblique truncata, angulo obtuso, inequaliter bipartitd transversim tenue et regulariter 
sulcatd, sulcis adlatus posticum evanescentibus ; umbonibus minimis, acutis, depressis, pro- 
eminentibus ; lunuld angustissima profundd ; ano depresso, levigato, lanceolato; cardine 
angusto ; dentibus minimis angustis simplicibus; marginibus in medio tenuissime crenu- 
latis.” —Deshayes. 
Shell transverse, ovately triangular, or rather irregularly oblong, inequilateral ; pedal 
side short and rounded; siphonal side produced, obtusely angulated; exterior with 
numerous and fine ridges, less distinct on the anal region, or side beyond the angular 
slope; beaks small, depressed; lunule elongate and narrow ; margins finely crenulated in 
the middle, smooth at the sides ; cardinal tooth serrated. 
Length, ths of an inch; height, ths of an inch. 
Localities. Bracklesham Bay (Hdwards). 
France: Grignon, Parnes, Calc. gross. (Deshayes). 
Not having the French specimens to compare with, I have placed the English fossil 
as an identity, depending upon figures and descriptions above referred to. Fig. 10 is, I 
think, a variety of this species, which may be called Azglica. It much resembles, and at one 
time I thought it identical with, Cr. donacialis, Desh., but it appears to differ in form, and 
