226 TURBO. TURBAN . 
the mouth, strongly and regularly striate longitudinally in 
a nearly straight direction, with nine flat volutious divided 
by a very fine line only: aperture somewhat orbicular, with 
a deep, impression at the upper end; the margin very broad, 
thick, white, and much reflected : pillar-lip a little detached 
from the body, with two tooth-like folds : length five-eighths 
of an inch : breadth one-eighth. 
In Hyde Park, and Battersea ; very rare. 
84. Turbo perversus. Reversed Turban. 
Montagu , pi. 11. f. 12— Linn . Trans, viii. pi. 5. f. 2— 
Dorset Cat. pi. 19. f. 11. 
Shell slender, tapering to a rather obtuse point, yellow¬ 
ish or greenish horn-color, obscurely wrinkled longitudi¬ 
nally but not regularly striate, with eight or nine rather 
rounded and deeply divided volutious : aperture somewhat 
orbicular, with a thin white margin; the outer-lip a little 
reflected ; pillar-lip not detached nor reflecting on the 
body, generally without te.eth, but in old shells maybe ob¬ 
served an obscure round knob or tubercle at the edge of the 
upper angle : length about a quarter of an inch ; breadth a 
fourth of its length. 
On the trunks and in the bark of trees, and in old walls. 
v. v. 
85. Turbo Vertigo. JVry-mouthed Turban. 
Montagu , pi. 12. f. 6. 
Shell oval or somewhat cylindrical, obtuse, brown, 
opake, with five rather rounded and well defined volutions, 
faintly striate longitudinally: aperture somewhat triangu¬ 
lar, with the angles rounded, slightly margined and in¬ 
dented or toothed, with one white tooth on the outer-lip, 
and two on the pillar, besides a laminar protuberance at 
the angle of the outer-lip : sometimes there are six teeth, 
and even the rudiment of a seventh: length half a line : 
breadth half its length. 
it has much the contour of T. sexdentatus, but is less; 
has the volutions reversed, and differs much in the aperture 
and teethi 
Ivy-clothed walls at Sandwich, and drifted sand of the* 
Avon, v, in. 
I. Flat, 
