PULMONATA. 85 



The whorls enlarge more regularly in this species than in L. caudata, and the shell, 

 consequently, is more pyramidal in its general form ; and the columellar fold is not so 

 prominent nor so much twisted as in that species. From L.fusiformis it is distinguished 

 by the greater convexity of the whorls, and the flattened sulcated fold. The rounder 

 whorls, the depression of the upper margin, and the acute fold of L. cincta, separate it, 

 as clearly, from that species. 



Although M. Deshayes, in his description of L. pyramidalis, cites Brard without 

 comment, I feel great difficulty in referring his shell to Brard's L. pyramidalis. That 

 shell, judging from the description and figure, is elongated and narrow, and 

 corresponds, as well in the contour and proportion of the whorls and the form of the 

 aperture, as in the character of the depressed columellar fold, with L. longiscata, to 

 which species I think it belongs. It certainly appears to differ widely from the 

 ventricose and comparatively short shell described by M. Deshayes, in which the 

 aperture is large and effuse, and the fold prominent.* The English specimens referred 

 to L. pyramidalis of M. Deshayes, agree very well with that author's description and 

 figure, but not with Brard's ; while, on the other hand, adult specimens of L. longiscata 

 frequently occur, which correspond with Brard's L. pyramidalis. 



The shell represented by fig. 3 a — b, for the use of which I am indebted to 

 Mr. Sowerby, is narrower than the type of this species ; and the volutions are so flat, 

 and the general shape so fusiform, that, at first sight, it might be referred to L.fusi- 

 formis. The fold, however, is flattened and sulcated ; and I therefore consider it to 

 be merely an aberrant form of L. pyramidalis, combining the columellar fold of that 

 species with the fiat-sided spire and subfusiform shape of L. fusiformis. 



Size. — Axis 2 inches ; diameter, 9-10ths of an inch, nearly. 



Localities. — Hordwell ; Headon Hill ; and in France, La Villette, Montmartre , and 

 Vergnols, near Aurillac. 



No. 32. LimNjEA longiscata. Brard. Tab. XII, fig. 3« — h. 



Lymnee effilee. Brard. 1809. Ann. du Mus., vol. xiv, p. 432, t. 27, figs. 15, 16. 



— pyramidale, Brard (?) 1810. lb., vol. xv, p. 407, t. 24, fig. 2. 

 Limneus longiscatus, Broffn. 1810. lb., p. 372, t. 22, fig. 9. 



_ _ Brogn. 1811. Jour, de Phys., &c, vol. 72, p. 421. 



Lymneus longiscatus, Fir. 1814. Mem geol., &c, p. 59, No. 1. 

 Limnea longiscata, Sow. 1823. Min. Con., vol. iv, p. 57, t. 343. 

 LYMN.EA — Desk. 1824. Desc. des coq. foss., &c, vol. ii, p. 92, t. 11, 



figs. 3, 4. 



— — Desk. 1824. Encycl. Meth.Vers., t. 2, p. 356, No. 1. 



* This want of resemblance between the L. pyramidalis of M. Deshayes and that of Brard is noticed by 

 Bouillet in his Catalogue above referred to. 



