304 MOLLUSCA. PECTINIBRANCHIA. Tubkitella. 
Length fths of an inch; white, slender; whorls slightly elevated; the 
spaces occupied by the depressions larger than those of the ridges ; aperture 
subovate. 
T. mtidissima. — Whorls nine, rounded, smooth. 
Turbo nit. Mmt. Test. Brit. 299. t. xii. f. 1. — Among fine sand, rare. 
Length |th of an inch ; slender, pointed ; brownish-white, glossy ; whorls 
much rounded and oblique ; aperture ovate, pillar-lip rounded. 
223. T. indistincta. — Whorls eight, flattened, ribbed trans- 
versely, striated spirally. 
Turbo ind. Mmt, Test. Brit. Supp. 129.— English and Scottish shores, 
rare. 
Length nearly y^oths of an inch ; breadth less than ^^gth ; colour brown, with 
darker spiral bands, glossy ; separating line deep ; transverse ridges numerous, 
rounded, waved, wanting on the lower part of the body-whorl, where the 
spiral striae are most conspicuous ; these last do not cross the ridges, but 
merely occupy, though faintly, the furrows. Montagu described this beauti- 
ful species from the Boysian cabinet. I obtained my specimen, which is 
quite fresh, from Loch Broom. 
224. T. carinatula. — Whorls seven to ten, bent towards the 
apex, with numerous transverse ribs, with a contracted margi- 
nated aperture. 
Turbo turritus carinatus. Walk. Test, Min. 12. t. xi, f. 44.— T. sub- 
arcuatus, Adams, Linn. Trans, iii. 66. t. xiii. f. 27-28.— On the English 
coast. — An obscure species. 
EXTINCT SPECIES. 
1 . T. cmoidea Whorls about eighteen, lower part of each angular, slightly 
projecting, longitudinal striae equally distant, seven or more, with intermediate 
smaller ones, all acutely crenulated — Sower. Min. Conch, t. xli. f, 1. 4. — In 
London clay* 
2. T. elongata. — Whorls about fifteen, flattened in the middle, lower parts 
projecting ; striae more distant near the middle of the whorls, inconspicuously 
crenulated, with some finer intervening striae — Sower. Min. Conch, t. xli. f. 2. 
—In London clay. 
3. T. Irevls. — ^Whorls about twelve ; spire rather short ; upper and lower 
parts of the whorls equally rounded ; striae ten or twelve, finely crenulated. — 
Sower. Min. Conch, t. xli. £ 3. — In Londm clay. 
4. T. incrassata. — Whorls about fourteen, flattish, with the lower part an- 
gular, and three smooth longitudinal threads ; outer lip thickened in the mid- 
dle. — In Crag, Holywell. 
5. T. edita. — Whorls about twenty, rounded, slightly depressed in the mid- 
dle ; lower parts rather prominent, with many obscure longitudinal striae. 
(Brander, Foss. t. iii. f. 48.) Sower. Min. Conch, t. xli f. 7- — In Londm clay. 
6. T. muricata — Whorls flattened on the upper side ; spirally striated, with 
transverse ribs rising into small spires at the outer sections.— Min. 
Conch, t. ccccxcix. f. 1-2 — In Coral Ray, Steeple Ashton, and Robin Hood’s 
Bay. 
7 . T. cingenda. — ^Whorls with a round crenated band upon the lower edge ; 
spirally striated ; the upper whorl with transverse ribs — Sower. Min. Conch. 
1, t. xcix. f. 3. — In shale with the last, Robin Hood’s Bay, near Scarboroughs 
