GASTEROPODA. 179 



one of which shows a peculiarly curved outer lip, sinuated or deeply cleft near the 

 suture, somewhat in the form of Stylifer astericola. 



It slightly resembles B. hijalina, Turt., but is much smaller, having the volutions 

 more convex, and without the flattened and angulated form of the upper part of 

 the volution of that species, nor is the apex so papilliform. 



Bulijea. Lamarck. 

 Philine. Ascanius. 1772 (ex Loven). 

 Lobaria. Mull. 1770. 



Gen. Char. Shell ovato-globulous, thin, and fragile, subhyaline or semi- 

 transparent in a recent state ; slightly convolute, with a large and open aperture, 

 and expanded outer lip ; spire small, sometimes hidden by the elevation of the 

 outer lip. 



In this genus the mantle is said by M. Deshayes, (second edition Lamarck, 

 Hist. Nat. des An. s. vert., vii, p. 664,) to be exceedingly large, covering the entire 

 shell, and rendering it invisible, and that the animal does not adhere by any muscle 

 of attachment. In some species, however, a deep muscular impression is made, 

 and left near the outer edge, both in the lower and upper part of it, as if the animal 

 had adhered very strongly to its shell. 



1. BuLLiEA quadrata. S. Wood. Tab. XXI, fig. 9., a — c. 



Bull;Ea quadrata. S. Wood. Mag. Nat. Hist. p. 461, pi. 7, fig. 1, 1839. 

 Bulla quadrata. S. Wood. Catalogue in An. and Mag. Nat. Hist. p. 460, 1842. 

 Puiline scutulum. Loven. Ind. Moll. Scand. p. 9, 1846. 



B. Tesld pusilld, apcrtd, subquadrald, tenui; vertice truncato, subumbilicato ; anfractu 

 laxe convoluto, superne coarctato, striis divergcvtibas, cateniformibus ornato ; margine 

 iniegro, inferne quadrato ; labio reflewo, sine umbilico ; aperturd patenlissimd. 



Shell minute, thin, and fragile, of a subquadrate form, with a large and expanded 

 outer lip ; vertex truncated ; apex slightly depressed ; volution contracted at the 

 upper part, ornamented with diverging, punctured, or chain-like stria? ; inner lip 

 expanded over the umbilicus ; outer lip sharp ; muscular impression deep and 

 distinct. 



Axis, y ; diameter, \ of an inch. 



Locality. Cor. Crag, Sutton. Recent, British Seas. 



I have but one perfect specimen of this shell, which may possibly be the same 

 species as the one recently found and described by M. Loven, in his ' Synopsis of 

 the Scandinavian Mollusca.' The state of preservation of the exterior of my fossil 



