TURBO. TURBAN . 
215 
dtudina! ribs running rather obliquely, each of which has 
a groove down the middle, giving them an appearance of 
being doubled, and very finely striate transversely, chiefly 
between the ribs : aperture nearly orbicular; the outer-lip 
\little dilated, bordered by a strong prominent.rim which 
has a groove in the middle of it; and at the inner angle 
of the aperture, near the junction of the first and second 
volutions, is a ridge running transversely backwards, and 
taming downwards, till it joins the margin of the lip be¬ 
hind; this ridge is bordered by a fine depressed line at the 
oad where the longitudinal ribs terminate; length the 
eighth of an inch ; breadth a third of its length. 
On sea weed, and in drifted sand. v. v. 
55. Turbo parvus. Small Turban. 
Walker, f. 43— Dorset Cat. pi. 19. f. 4. 
Turbo subluteus. Linn. Trans, m. pi. 13. f. 15,. 1G. 
Turbo aereus. Linn. Trans. iii. pi. 13. f. 29, 30. 
Turbo lacteus. Donovan , pi. 90. 
Shell strong, conic, opake, white, cliesnut-bro wn, or pale 
rufous, sometimes spotted, or dark brown with white ribs: 
spires six or seven, rounded and well defined, with about 
twelve strong obtuse equidistant ribs, which sometimes run 
the whole length oF the shell, sometimes down one or two 
of the larger volutions, and frequently along the lesser vo¬ 
lutions only, and have occasionally the appearance of being 
grooved down their middle ; the interstices between them 
quite smooth: aperture roundhh ; the outer-lip thickened 
by a rib; inner-lip a little reflected, but not perforated be¬ 
hind the middle: length the eighth of an inch ; breadth ' 
not half its length. 
On the leaves, and among the roots of Fuci. v. v. 
56. Turbo indistinctus. Indistinct Turban. 
Montagu, Suppl. p. 129. 
Shell somewhat cylindrical, obtuse, glossy-white: spires 
five or six, nearly flat, but well defined by the separating 
line, finely striate longitudinally, and punctured in the in¬ 
terstices, observable only when much magnified, but not 
crossing the longitudinal ridges : aperture inclining to 
oval; pillar-lip smooth and a little spread: length the 
tenth of an inch ; breadth a third of its length. 
