GASTEROPODA. 181 



3. BuLLiEA scabra. Midi. Tab. XXI, fig. 12, a — c. 



Lobaria scabra. Mull. Zool. Dan. t. 7, fig. 1, 1776. 

 Scaphander catenata. Leach. Moll. p. 55, 1820. 

 Bulla pectinata. Dillwyn. Descrip. Catal. 1817. 



— W. Wood. Ind. Test. 1828. 



Bullina granulosa. Sars. Beskrivelser og Iagttagelser, p. 75, pi. 14, fig. 36, 1835. 

 Bulla angustata. Phil. En. Moll. Sic. p. 121, t. 7, fig. 17, 1836. 

 Bull^a punctata. - - vol. ii, p. 95, 1844. 



Bulla dilatata. S. Wood. Illust. in Mag. Nat. Hist. p. 462, pi. 7, fig. 3, 1839. 



— catenata. S. Wood. Catalogue 1842. 



— lineolata (?). Gould. Invert. Massachus. p. 169, fig. 99, 1841. 

 Philine scabra. Lovcn. Ind. Moll. Scand. p. 9, 1846. 



Bulla. Encyclopedic Metkodique, pi. 360, fig. 3. 



B. Testa angustd, subcglindraced, tenia fragili, inferne dilatata ; densissime striata, 

 striis diver gentibus, cateniformibus ; spird distinctd, convexd, obtusd ; labro acuto, sine 

 umbilico. 



Shell subcylindrical, thin and fragile ; volutions loosely enrolled ; aperture 

 elongate and gaping, expanded at the lower part, externally striated, with impressed 

 chain-like diverging strias; outer lip sharp, a little curved; inner lip slightly 

 reflected, and without an umbilicus; muscular impression distinct and deep. 



Axis, \ an inch. 



Locality. Cor. Crag, Sutton. Recent, Scottish Coast. 



This is a very rare and an extremely fragile shell, and is no doubt identical with 

 the northern British species, which, in the recent state, is nearly transparent ; that 

 character is, of course, lost in the fossil. The upper part of the volution is rather 

 rounded, causing a deep suture, or subcanal, around the spire, which is low and 

 convex. The beautiful chain-like stria) encircle the upper part of the shell hori- 

 zontally, but diverge towards the base, running parallel to the inner lip ; they are 

 formed of small oval depressions, like the links of a chain, visible from within, and 

 producing, at the base of recent individuals, a fimbriated edge. A slight contrac- 

 tion above the middle of the volution is visible in some specimens, but not in all. 

 The aperture is expanded at the lower part, and a muscular impression is visible 

 within the outer lip. This impression is separated in the centre, and deeply 

 impressed both above and below, as if the animal adhered firmly to the shell ; the 

 outer lip is rounded at the upper part, and the spire is always visible. The left lip 

 is slightly reflected, forming a ridge, but there is no umbilicus. M. Philippi, in his 

 second volume, has changed the name of angustata to that of punctata, Adams, 

 which, I believe, is a very different shell. 



