1 20 HELICID^. 



Animal dark-grey. 



This is a southern species. It occurs around London, 

 and was stated hy Miller to exist in the neighbourhood of 

 Bristol. 



0. PLicATULA, Draparnaud. 



Plate CXXIX. fig. 3, 



nansUmplicatuh, Drap. Moll. Ter. et Fluv. France, p. 72, pi. 4, f. 17, 18.— 

 Fleming, Brit. Anim. p. 272. — Jeffreys, Trans. Linn. 

 Soc. vol. xvi. p. 353. — C. Pfeif. Deutsch. Land und Si'issw. 

 Moll. pt. 1, p. G4, pi. 3, f. 31.— Lam, Anim. s. Vert. (ed. 

 Desh.) vol. viii. p. 201. — Rossmassl. Iconog. Land und 

 Siissw. Moll. pt. 1, p. 79, f. 32; pt. 7, p. 18, f. 471 to 475. 

 — FoRST. Nov. Act. Leopol. vol. xix. pt. 2, p. 27(>, pi. 58, 

 f. 7. — L. Ppeif. Monog. Helic. vol. ii. p. 481. 

 Turho conversus. Alten, Erd und FlUssconch. Augsburg, p. 18, pi. 2, f. 3. 

 Claudlia corrugata ? Gartn. Conch. Wetteran, p. 21. 



„ Tphigenia Rolphii, Gray, Medical Repository, 1821 (no description.) 

 „ liolphii, Gray, Annals Philos. 1825, p, 413 (no description). — Turt. 

 Manual L and F. W. Shells, p. 71 (ed. Gray), p. 215,f. 54. 

 —Brown, 111. Conch. G. B. p. 38, pi. 18, f. 31. 

 Stomodonfa plicatida, Mermet, Moll. Pyren. p. 47. 



Shell subcylindraceous fusiform, neither slender nor much 

 elongated (often, indeed, abbreviated), nor transparent, 

 moderately strong, subrimate, umber, or of a reddish 

 chocolate brown, not variegated ; costellar strise close (yet 

 slightly wider than their intervals, which are not appa- 

 rently striated across), fine, only slightly raised. Whorls 

 ten to thirteen, not particularly convex ; spire regularly 

 tapering ; apex not peculiarly blunt. Mouth rounded, 

 pear-shaped ; peristome continuous, slightly raised (the 

 edge not appressed above), dilated, and somewhat reflected 

 throughout. Parietal, or upper lamella prominent, reach- 

 ing the edge ; pillar fold, or lower lamella, projecting, yet 

 not advancing to the margin ; space between the principal 

 folds set with two or three smaller marginal ones ; lunella 



