360 MOLLUSCA. CERITHIAD^. Sigaretus. 



2. R. rimosa. Fusiform, whorls slightly convex, longitudinally ribbed, 

 transversly striated ; lip reflected, with a sinus at the inferior edge, below an 

 expansion of the margin, and a canal at the superior edge, extending nearly 

 the length of the spire ; beak straight. (Murex rimosus, Brander, f. 27.)— 

 Sower. Min. Conch, t. xci. f. 4, 5, 6 — London Clay. 



3. R. macroptera Fusiform, smooth ; lip large, nearly circular, with a ca- 

 nal extending along the spire; beak straight, pointed. (Strumous ampins, 

 Brander, f. 76.) Sower. Min. Conch, t. ccxcviii, ccxcix, ccc — In London 

 Clay. 



4. R. Parkinsonii Subfusiform ; whorls seven or eight ; convex, with lon- 

 gitudinal ribs, and numerous transverse striae ; outer lip dilated ; armed with 

 one styloid process, beneath which is a broad truncated expansion. Rostella- 

 ria, Park. Organic Remains, iii. C3. t. v. f. 11. R. Park. Mantell. Suss. 72 

 and 108. t. xviii. f. 1,2, 4, 5, 6, 10.— In Green Sand and Grey Chalk-marl. 



5. R. Sowerbii Turrited, costated, transversely striated ; last whorl tri- 



carinated ; aperture expanded, with a one-angled enth-e lip ; superior canal 

 short R. Parkinsonii, Sower. Min. Conch, t. cccxlix. F. 1, 5.— London Clay. 



6. R. calcarata.— Turrited, costated, transversely striated; costse linear, 

 curved ; last whorl carinated ; outer Up furnished with a large oblong process, 

 the upper angle of which is formed into a long curved spire ; beak pointed ; 

 superior canal obtuse. Park. Org. Rem. iii. 63. t. v. f. 2. — Smver. Min. Conch. 

 t. cccxlix. f. 6, 7- — Green Sand. 



Gen. LXXXIV. SIGARETUS.— Shell patulous, imbedded 

 in the cloak, the anterior sinistral margin of which is 

 notched at the branchial opening ; tentacula two, with the 

 eyes at the external base. 



— 355. S. haliotoideus. — Tentacula short, flat, the foot rounded 

 behind. 



Bulla hal. Mont. Test. Brit. 211, Shell t. vii. f. 6, Animal vig. 2. f. 6 — 

 In deep water, not common. 

 Shell fths in length, and |ths of an inch in breadth ; oval, depressed, pel- 

 lucid, whitish, wrinkled by the lines of growth ; whorls two, the first very 

 small, forming the rudiment of a spire near the margin, the second rapidlv 

 increasing and forming a shallow basin ; outer lip thin, inner lip concave, 

 and slightly inflected. Animal oval, convex ; skin tough ; cloak broad, di- 

 vided from the foot by a groove ; mouth in the form of a short proboscis. 



356. S. tentaculatus. — Tentacula produced, filiform ; the 

 foot pointed behind. 



Lamellaria tentaculata, Mont. Linn. Trans, xi. 186. t. xii. f. 5, 6. — Coast 

 of Devon. 

 Shell more depressed and opake than the preceding. Animal suborbicular, 

 depressed, convex above, yellowish, with sulphur coloured and black spots ; 

 foot ovate, broad ; the breadth about three quarters of an inch. 



