370 MURICIDiE. 



foliaceous and rib-like varices, in some species tuLerculated, 

 in others spinous or fimbriated, often crossed by spiral strlse 

 or sulcations ; spire variously elevated, acute. Aperture 

 round or ovate, terminating- in a contracted, often much 

 produced canal, which is not unfrequently partially closed. 

 Operculum corneous, unguicular, semi-concentrically lamel- 

 lated, its nucleus terminal. 



Animal, vi'ith a broad lunate flattened head, flanked by 

 two tentacula, having stout bases, bearing the eyes at one- 

 half or two-thirds of their lengths ; proboscis retractile, 

 moderately long, tongue armed with transverse rows of 

 teeth, each row composed of a central transversely and 

 quadrately oblong axile tooth, with three recurved 

 denticular processes, and two claw-shaped lateral teeth. 

 Mantle lax, produced into a siphon which is not extended 

 much beyond the canal of the shell. Branchial plumes 

 two. Male organ curved, lanceolate, reflected. Foot 

 ovate or subquadrate, rather small, posteriorly obtuse, 



M. ERiNACEUs, Linnaeus. 

 Bather large, brownish white ; ribs usually somewhat foliated. 



Plate CII. fig. 4. 



Knorh, Delices des Yeux, vol. iv. pi. 23, f. 3. 

 Murcx crinacens, Linn. Syst. Nat. ed. 12, p. 1216. — Penn. Brit. Zool. cd. 4, 

 vol. iv. p. 123, pi. 76, f. 95. — Pulteney, Hutchins, Hist. 

 Dorset, p. 43. — Donov. Brit. Shells, vol. i. pi. 35. — Mont. 

 Test. Brit. vol. i. p. 259. — Maton and Hack. Trans. Linn. 

 Soc. vol. viii. p. 142. — Rack. Dorset Catalog, p. 4C, pi. 14, 



f. 7 TuRT. Conch. Diction, p. 87. — Forbes, Malac. 



Moncns. p. 25, animal. — Macgilliv. Moll. Aberd. p. 168. 

 — Brit. Marine Comh. p. 168. — Brown, Illust. Conch. G.B. 

 p. 6, pi. 6, f. 5, 6.— Born, Test. Mas. Goes. Vind. p. 294, 

 pi. 11, f. 3, 4. — Olivi, Zool. Adriat. p. 151. — Dillw. 

 Recent Shells, vol. ii. p. 690. — Lamarck, Anim. s. Vert, 

 (ed. Desh.) vol. ix. p. 591. — Woou, Lidex Testaceolog. 



