S60 
MOLLUSCA. CERITHIAD^. 
SiGAllETUS, 
2. II. 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. 2?.) — 
Sower. Min. Conch, t. xci. f. 4, 5, 6. — London Clay. 
3. R. macroptera — Fusiform, smooth ; lij^ large, nearly circular, with a ca- 
nal extending along the spire; beak straight, pointed. {Strombus ampins., 
Brander, f. 76*) Sower. Min. Conch, t. ccxcviii, ccxcix, ccc. — In Lmdon 
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. 63. 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. SowerUi. — Turrited, costated, transversely striated ; last whorl tri- 
carinated ; aperture expanded, with a one-angled entire lip ; superior canal 
short. — R. Parkinsonii, Sower. Min. Conch, t. cccxlix. f, 1, 5. — London Clay. 
6. R. calcarata. — Turrited, costated, transversely striated; costae linear, 
curved ; last whorl carinated ; outer lip furnished with a large joblong 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 — Sower. Min. Conch, 
t. cccxlix. f. 6, *1.— 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 |ths 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 rapidly 
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. 
