14 EOCENE MOLLUSCA. 
In the Catalogue of Species from Hordle Cliff which I gave in that Journal, p. 118, I 
observed that this species and two others of Deshayes, oddiqua (obliquata) and cycladi- 
Jormis, were merely varieties of one species. I have, however, thought that it would be 
productive of less confusion, and facilitate the comparison of the French and English 
Eocenes, to adhere to Mr. Deshayes’ specific determinations, more especially as my 
specimens appear to correspond with his figures and descriptions, and I have therefore 
done so. 
Fig. 6 a, 6 represents a small and not well-determined species, of which Mr. Morris 
seemed doubtful when he figured it in the ‘Memoirs of the Geol. Survey’ by Forbes, as 
Cyrena gibbosula, Pl. vi, fig. 13. I have not seen the specimen, but have had the figure 
copied. It looks like a deformed specimen of C. deperdita. 
18. Cyruna pisum, Deshayes. Tab. B, fig. 12 a, 0. 
Cyrmna prsumM, Desh. Desc. des Coq. Foss. des Env. de Par., p. 117, pl. xix, 
figs. 10—13, 1824. 
— — 8S. Wood. Uond. Geol. Journ., p. 118, 1847. 
Spec. Char. “ C. Testé minima, subtrigond, globulosd, levigatd ; umbonibus inflatis, 
productioribus, obliquis ; dentibus cardinalibus tribus, in alterd binis, lateralibus sub- 
equalibus admotis levigatis.” (Desh.) 
Length, =sths of an inch; Aetght, th of an inch. 
Localities. Britain: Hordle (S. Wood). 
France: Houdan. 
This shell is by no means rare in the sandy deposit at Hordle. It is difficult to 
separate it from deperdita, but that shell is more transverse, and not quite so tumid. 
19. Cyrena cycniapirorMis, Deshayes. ‘Tab. B, fig. 11 a, 6. 
CyRENA cycLApIForMIs, Desh. Coq. Foss. des Envy. de Par., vol. i, p. 121, t. xix, 
figs. 7—9, 1824. 
— _ S. Wood. Lond. Geol. Journ., p. 18, 1847. 
— — Morris. Catal. Brit. Foss., 2nd edit., p. 200, 1854. 
_ _ Sandberger. and-Conch., p. 208, t. xi, fig. 3, 1872. 
Spec. Char. “C. Testé ovatd, transversd, subequilaterali, laevigata, ten, fragil ; 
umbonibus minimis ; dentibus cardinalibus tribus valvd deetrd ; duobus in alterd, posticalibus 
bifidis ; dentibus lateralibus lamellosis, minimis levigatis.” (Desh.) 
