TURBO. TURBAN. 197 



rather spindle-shaped outline ; and in the inner-lip nut be- 

 ing so much spread on the pillar. 

 On rocks at low water, v. v. 



9. Turbo rudis. Sordid Turban. 



Donovan, pi. 33. f. 3 Linn. Trans, viii. pi, 4.L 12, 13 

 Dorset Cat. pi. 18. f. 6. 



Shell thick, strong, somewhat oval, rather pointed, 

 smooth or very faintly striate spirally, and a little wrinkled 

 longitudinally: spires five, much rounded and well denned 

 by a deep separating line : color grey, greenish, reddish, 

 or brown of various shades, and sometimes banded ; inside 

 colored, but generally white round the margin of the lip 

 and on the pillar: aperture round-oval ; the outer-lip thick, 

 with a fine edge ; pillar-lip broad, white, polished, with 

 generally a small puncture at the base, like an incipient 

 perforation : length three-quarters of an inch 5 breadth not 

 quite so much. 



It is at once distinguished from T. litoreus, by the tumid 

 and distinctly defined volutions. 



Western coasts, and Dublin bay. v. v. 



10. Turbo tenebrosus. Dusky Turban. Fig. 3G, 3/. 

 Montagu, pl.20.f. 4 Dorset Cat. pi. 18. f. 15. 



Shell thick, conic, dark purple, often covered with a 

 rough grey or dull ferruginous coat, frequently prettily 

 chequered by transverse broken short buff-colored lines, 

 which sometimes extend to the lip and give it the appear- 

 ance of being notched : spires five or six, rounded and well 

 defined, the largest covering more than half the shell, 

 slightly striate longitudinally, and very rarely transversely 

 in an obscure manner, ending in a rather obtuse point : 

 aperture somewhat orbicular, very dark purple on the in- 

 side ; outer-lip thin, but gradually dilating towards the pil- 

 lar, which is uniformly of a dark glossy purple : length 

 three quarters of an inch ; breadth five-eighths. 



It much resembles the T. rudis, but is distinguished by 

 the dark purple hue, thin outer-lip which does not suddenly 

 thicken from the margin, but especially in the dark purple 

 color of the inside, which always extends over the flattened 

 surface of the pillar. 



s3 It 



