224 
TURBO. TURBAN. 
a correspondent enlargement of the primary volution, a 3 
answering to its necessary character-, t( apertura subeffusa,’* 
or having the aperture narrow and much extended. These 
shells therefore, under our consideration, having the aper¬ 
ture more or less oval or orbicular, and the primary volu¬ 
tion not larger than its usual proportion to the others, na¬ 
turally fall into this division of the genus Turbo. 
H. With the spires reversed , 79 to 85. 
79. Turbo bidens. 7 'n o-toothed Turban. 
Pennant, pi. S4.f, 5 — Linn. Trans, viii. pi. 5.f. 3. 
Shell tapering, smooth, brown, transparent: spires ten 
or eleven, armed with a series of small white bead-like pro¬ 
jections which wind spirally round the junctions of the vo¬ 
lutions, giving this part a slightly crenate or notched ap¬ 
pearance : aperture oval, with two teeth placed deep within 
the mouth : length about half an inch ; breadth a fourth of 
its length. 
Found in the Pulteney cabinet, supposed to he from Dor¬ 
setshire. 
80. Turbo laminatus. Laminated Turban. Fig. 70. 
Montagu, pi. 11. f. 4 —Dorset Cat. pi. 1.9. f. 9. 
Shell tapering to a round point, swelling a little above 
the. mouth, reddish horn-color, transparent, smooth or very 
obscurely wrinkled, with ten rather raised and well defined 
volutions : aperture somewhat orbicular, contracted at the 
upper and outer margin, at which part it joins the body 
volution; the outer-lip white, slightly margined and re¬ 
flected; pillar-lip a little thickened', riot raised nor detached 
from the body of the larger volution, with two white tooth¬ 
like folds, and deep within the mouth are three or four pro¬ 
minent ridges, only visible within the shell when held up 
before the light: length three-quarters of an inch 3 breadth 
a fourth of its length. 
W oods in Wiltshire and Kent: rare. v. 
81. Turbo biplicatus. Folded Turban. 
Montagu, pi. 11. f. 5. 
Shell taper, opake, brown, a little swollen above the 
»# • ’ mouth, 
