CLAUSILIA. MOLLUSCA 57 



Gen. 78. CLAUSILIA, Lam. Turbo, Lin. 

 Shell generally fusiform, slender, with the summit slightly ob- 

 tuse ; aperture irregular, rounded oval, with the margins unit- 

 ed, free, and reflected outwards. 



C. papillaris, Lam. Shell fusiform, pellucid, with the whorls re- 

 versed, and the suture slightly crenated ; aperture two-toothed. 

 7 lines long. Inhabits Southern Europe Bonan. 3, fig. 41. 



C. rugosa, Lam. (Bulimus perversus, Brug.) Shell sinistral, slen- 

 der, acute, striated, reddish ; aperture bidentate ; margin of the 

 lip white, reflected. 4 lines long. Inhabits France. Drap. Moll. 

 pi. 4, fig. 19, 20. 



Gen. 74. PUPA, Lam. Helix, Lin. 



Shell cylindrical, in general thick ; aperture irregular, semi-oval, 

 rounded, and subangular inferiorly ; margins almost equal, 

 reflected outwards, and disjoined in their upper part, a colu- 

 mellar plate being interposed between them. 



P. mumia, Lam. Shell cylindrical, obtuse, thick, white, with the 

 furrows of the whorls longitudinally oblique ; aperture fuscous 

 red ; bidentate ; lip with the margin reflected. 16 to 17 lines 

 long. Inhabits the West Indies. Lister, pi. 588, fig. 48. 



P. uva, Lam. Shell cylindrical, obtuse, with straight longitudinal 

 ribs, and about nine whorls ; aperture semi-ovate and one-tooth- 

 ed ; colour grayish- white, sometimes tinged with red. 1 inch 

 long. Inhabits West Indies. Pet. Gaz. pi. 27, fig. 2. 



P. muscorum, Lam. {Turbo, Lin.) Shell very small, cylindrical, 

 obtuse, smooth, brownish horn-coloured, whorls convex j aperture 

 unidentate ; margin of the lip reflected. About a line long. In- 

 habits Europe, under stones, &c. B Brown's Illust. pi. 41, fig. 3. 



Gen. 75. HELICINA, Lam. 



Shell subglobose, not umbilicated ; aperture entire, semi-oval ; 

 columelia callous, transverse, with the margin edged, and form- 

 ing an angle at the base of the right margin ; operculum 

 horny. 



The shells of this genus somewhat resemble the Neritae in their external appear- 

 ance. But, besides being distinguishable by their transverse, depressed, and callous 

 pillar, they are all terrestrial shells, some living on trees and others on the ground. 



H. nentella, Lam. Shell ventricose, conoidal, glabrous, white, 

 with the margin of the lip reflected. 7 lines long. Inhabits 

 West Indies Lister, pi. 61, fig. 59. 



H. viridis, Lam. Shell very small, orbiculo-convex, depressed, ca- 

 rinated, smooth, shining, green ; lip simple, acute. 2 lines in 

 diameter. Inhabits St Domingo. Lam. vi. 2. 103. 



Gen. 76. ANOSTOMA, Lam. Helix, Lin. 

 Shell orbicular, with the spire convex and obtuse ; aperture 

 rounded, dentated within, and turned upwards towards the 

 spire ; outer margin reflected. 



