273 MOLLUSCA. PULMONIFERA. Vertigo. 



Muller (Verm. 120.), to which Montagu refers his species with doubt, is 

 more probably the T. htdens of Dr Pultney (Dorset, 46.), which he describes 

 as having the " sutures of the volutions elegantly crenated," and which Ma- 

 ton and Rackett (Linn. Trans, viii. 178. t. v. f. 3.) consider as the Turbo 

 bidens of Linnaeus, but a species not of British growth. 



102. C. plicaiula. — Aperture with five or six teeth on the 

 Iwdy-lip. 



Drap. Moll. 72. — C. Rolphii of Leach, Turt. on Zool. Joum. No. viii- 

 565.— England. 

 Length about half an inch, swollen in the middle ; whorls ten or more, round- 

 ed toAvards the apex ; lines of growth well marked, those near the aperture 

 wrinkled ; aperture subquadrangular, contracted on the outer retral angle. 

 The teeth vary in number, one at the end of the range large, the interme- 

 diate ones small. Examples of this shell were sent me by Dr Leach, as a 

 new species, from Charleston Woods, Kent. I agree, however, with Dr 

 T urton, in referring it to the C. plicaiula of Draparnaud, although the figure 

 given in his work, expresses less perfectly the shape of the British shell than 

 the one which represents C. bidens. — Dr Turton, when noticing this shell, adds, 

 "■ At Torquay we found a perfectly formed specimen of the C. parvttla, men- 

 tioned by Dr Leach. It is much less and more slender than C. nigosa of Dra- 

 parnaud, and is very faintly striate or smooth, except on the lower volution. 

 The two possessed by the Provost of Eton, are no doubt the same. The 

 aperture resembles that of C. rugosa.''* 



103. C. labiata. — Whorls nine, flat ; the Hnes of growth strong, 

 continuous. 



T. labiata, Mont. Test. Brit. t. 362. t. xi. f. 6 — On trees near London, 

 Mr Swainson. 

 Length |ths of an inch, lengthened, light brown, opake ; separating line 

 obsolete, not interrupting the striiE ; aperture suborbicular, contracted re- 

 trally ; pillar-lip with two teeth ; peristome broad, thick, white, nearly free, 

 reflected This sheU, which has escaped the notice of more recent collec- 

 tors, is probably only a variety of C. perversa., which exhibits considerable 

 modifications of growth. 



Gen. XXVIII. VERTIGO.— Tentacula two, with eyes at 

 the tips ; pillar simple. 



1 04, V. pusilla. — Whorls five ; aperture \^ith teeth on both 



sides. 



Mull. Verm. 124 — Turbo vertigo, Mont. Test. Brit. 363. t. xii. f. 6.— 



Pupa vertigo, Drap. Moll. 61 Ivy -walls, England. 



Length about half a line, bluntly conical ; whorls rounded, with distinct 

 lines of growth ; aperture subtriangular, the base or lip on the body-whorl 

 has two conspicuous teeth ; the pillar-lip has one near its retral extremity ; 

 the outer-lip has likewise one ; besides these there are sometimes two or 

 three smaller intermediate teeth ; pei-isome reflected at the pillar, forming a 

 distinct cavitv. 



