TURBO. TURBAN\ 225 
mouth, strongly and regularly striate the whole length in a 
rather.oblique direction, with twelve or thirteen rather 
rais ed and w ell d efined volutions: aperture somewhat'or- 
blHilar/rmich compfessc r d'itt the upper part, and a little so 
at the base; the lips rather thick, white, and reflected, and 
the margin connected all round ; pillar-lip prominent, de¬ 
tached from the body, with two white tooth-like folds near 
each other: length t hree-quarters of aji jnch : breadth a 
fourth of its length. 
It difiers from the last, in not being transparent in its re¬ 
gular strife, and the angle ot the aperture not joining the 
larger volution. 
Woods in Wiltshire, at the roots of trees, v. m. 
82. Turbo nigricans. Dark Turban. 
Pennant , pi. 85. f. 3 —Dorset Cat. pi. 19. f. 10. 
Turbo bidens. Montagu , pi. 11. f. 7- 
Turbo perversus. Donovan , pi. J2. 
Shell taper, blackish or dark chocolate-brown, opake, 
finely and regularly striate longitudinally in a rather oblique 
direction, a little swollen above the mouth, with eleven or 
twelve very little raised hut well defined volutions : aper¬ 
ture roundish-oval, compressed at the upper part into an 
oblique angle, where it is detached from the body volution; 
the margin whitish, obtuse, but not flattened nor reflected, 
behind which are two raised ridges on the back with a de¬ 
pression between them, and a deep groove down the side of 
the lip where the teeth are placed : the teeth are two mem¬ 
branaceous folds, seated deep in the mouth ; one of them 
prominent, the other more interior and less distinguishable: 
length about half an inch ; breadth a fourth of its length. 
Old shells become grey. 
It differs from the last and the next, in color, in the mar¬ 
gin of the aperture not being flattened nor reflected, and 
in the ridges behind the mouth. 
Shady woods, under stones, and in old walls, v. v. 
83. Turbo labiatus. White-lipped Turban. 
Montagu, pi. 11. f. 6—Da Costa, pi. 5. f. 15 —Dorset 
Cat. pi. 21. f. 15. 
Shell taper, light brown, opake, a little swollen above 
the 
