TURBO. TURBAN. 
221 
The .sharp margin of the lip, the strong rib behind it, and 
the position of the tooth distinguish it specifically. We 
have obtained it in great abundance, on the sand banks at 
Portmarnock in Ireland, and among the rejectments of ri¬ 
vers in England, v. v. 
/I. Turbo sexdentatus. Sty-toothed Turban. 
Montagu , pi. 12. f. 8 — Dorset Cat. pi. 19. f. 12.* 
Shell oval, horn-color, semitransparent, obtuse : spires 
live, a little rounded, faintly striate longitudinally : aperture 
somewhat triangular and distorted, projecting and rounded 
at the upper and outer angle, slightly margined and re¬ 
flected, with a small rib behind it as in T. Chrysalis 5 the 
outer-lip rather angular, with four obscure teeth ; pillar-lip 
with two teeth, and a slight perforation behind it: length 
the tenth of an inch; breadth half its length. 
Without a close examination of the aperture, this spe¬ 
cies may be easily overlooked for the young of T. Musco- 
rum. The teeth are so obscure as hardly to be manifest 
without considerable magnifying powers, and the younger 
shells have only four. 
On the water-flag: rare. v. v. 
72. Turbo Carychium. Minute Turban. 
Montagu , pi. 22. f. 2— Dorset Cat. pi. 19. f. 13— Walker , 
f. 51. 
Shell oblong-oval, glossy-white, transparent, obtuse: 
spires five, rounded and well defined,finely striate obliquely: 
aperture oblong-oval, oblique, compressed, and margined ; 
the outer-lip thickened on the inside by a protuberance 
in the middle ; pillar-lip a little angular and reflected, with 
two teeth, and sometimes the rudiment of a third above 
them, without perforation behind it 3 length hardly the 
tenth of a breadth nearly half its length. 
Wet banks : under decaying wood; and in drifted sand. 
*. v. * 
73. Turbo insculptus. Sculptured Turban. 
Montagu , Supplement , p. 129. 
Shell taper, white, semitransparent, obtuse: spires five 
or six, a little raised, with fine regular circular struc: 
u 3 aperture 
