214 TURBO. TURBAN. 
lar : length a quarter of an inch 5 breadth one third of its 
length. 
Found by Mr. Bryer, at Weymouth. 
52. Turbo denticulatus. Denticled Turban. 
Montagu, p. 315. 
Shellconic, rather obtuse,white, semitransparent: spires 
six, with nine or ten strong coarse longitudinal ribs, not 
undulate nor striate in the interstices, but running ob¬ 
liquely, and forming strong tubercles round the lines of 
junction : aperture orbicular 5 the outer-lip not margined, 
but thickened by a rib ; pillar-lip smooth, indented, with a 
small tubercle or two at the base close to the ribs : length 
not quite a quarter of an inch; breadth half its length. 
From the last it differs, in having fewer ribs, which run 
obliquely and are not undulated, in wanting the fine trans¬ 
verse strim between them, and in the aperture which is not 
strictly margined, but thickened with a rib behind it. 
Found at Weymouth, by Mr. Bryer. 
53. Turbo Bryereus. Bryer $ Turban. 
Montagu, pi. 15. f. 8 — Dorset Cat. pi. 19. f. 7- 
Turbo costatus. Donovan , pi. 178. f. 3. 
Shell strong, conic or rather elongated, pointed, glossy- 
white : spires seven, rather rounded and well defined, with 
seventeen or eighteen fine longitudinal ribs, which arc 
scarcely interrupted by the line of junction, and not striate 
transversely : aperture oval, the outer-lip strong, not mar¬ 
gined nor reflected ; pillar-lip smooth, a little turned back, 
but not perforated behind it: length hardly a quarter of an 
inch; breadth a third of its length. 
Variety. With stronger and fewer ribs, not exceeding 
ten or twelve in number. 
Weymouth, Margate, and Dunbar, v. m. 
54. Turbo costatus. Ribbed Turban. 
Montagu, pi. 10. f. 6 — Linn. Trans, iii. pi. 13. f. 13, 14— 
Dorset Cat. pi. 19. f. 5—Walker, f. 47. 
Shell conic, a little tapering, rather obtuse, glossy-white, 
semitransparent : spires five, rounded and well defined by 
the separating line, with eight or nine strong distant lon¬ 
gitudinal 
