PULMONATA. 89 
I propose this species with hesitation ; it may be only a variety of LZ. pyramidalis 
or of LZ. gibbosula, but the characters it presents are so mixed, that it is difficult to 
determine to which species it should be referred. The narrow, flat, and nearly 
straight fold resembles very closely that of Z. gibbosula; but the spire is more 
elevated, more pyramidal, the volutions more regularly convex, and the aperture not 
so effuse. It is distinguished from the typical ZL. pyramidalis, not only by the 
columellar fold, which in the latter species is larger, more oblique, and more 
prominent, but also by the flatness of the sides of the spire, and the greater length of 
the aperture ; and from the variety of that species, by the more contracted aperture. 
In the character of the spire, and the contracted aperture, it approaches L. fusiformis; 
but it is separated from it by the columellar fold, which in that species is rounded, 
prominent, and more twisted. 
Size.—Axis, 1 inch and 6-10ths; diameter, 8-10ths of an inch. 
Locality.—Headon Hill. 
No. 37. Limnza ovuM? Brogn. Tab. XIV, fig. 12 a—4é. 
LIMNEUS OvuM, Brogn. 1810. Ann. du Mus., vol. xv, p. 374, tab. 22, fig. 13 a, B. 
-— —  Brogn. 1811. Journ. de Phys., &c., p. 422. 
Lymneus — Férus. 1814. Mém. geol., &c., p. 60, No. 6. 
Lymnma — Desh. 1824—37. Desc. des coq. foss., &c., vol. ii, p. 97, tab. 11, 
figs. 15, 16. 
a — Desh. Encyc. Méth. Vers., vol. ii, p. 361, No. 16. 
— — RBouill. 1836. Cat. des coq. foss. d’Auv., p. 131, No. 13. 
L. testé ovali, sub-ventricosd, acuminatd, sub-levi; anfractibus sex, convexis, ultimo 
magno: apertura mediocri, ad basin sub-dilatatd ; columella marginatd ; plicd columellari 
parva, compressa, sulcatd, anticé angulatd, parum tortuosd. 
As I have not had an opportunity of comparing the English with French 
specimens of this species, the identification cannot be altogether free from doubt. 
The English shell is nearly smooth, ovate, and sub-ventricose, with a moderately 
elevated and pointed spire; volutions six or seven, separated by a conspicuous but 
not deep suture. The aperture is not wide, but is a little dilated in front, and is about 
half the length of the entire shell: the columellar fold is small, compressed, obscurely 
sulcated, very shghtly twisted, and scarcely projects into the aperture; the anterior 
margin presents an acute ridge, formed by the prolongation of the sharp edge of the 
peristome ; the inner lip is slightly reflected. 
The aperture is not so contracted in front as M. Deshayes describes that of the 
French shell to be; it agrees very well with Brogniart’s figure, but not with that given 
by M. Deshayes, although the latter was taken from Brogniart’s specimen. In other 
respects the English shells do not appear to differ from the French. x 
elk 
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