TURBO. TURBAN. 191 
Shell conic, pointed : spires six or seven, hardly raised 
or rounded, but defined by a raised beaded rib, and each 
ration surrounded by four or five lesser beaded lines ; 
lie base regularly and distinctly striate circularly r color 
jifft brownish, or white ; the larger ridges often red, and 
sotted with white, and the tip generally of a fine deep 
a Jason: aperture nearly square, not perlaceous within, 
fill sometimes a small indenture behind the pillar, like 
liiodpient perforation : diameter a quarter of an inch; 
jffht three-eighths. 
Western coasts, and Dublin bay. v. v. 
11. Trochus erythroleucos. Streaked Top-shell . 
Lkler, pi. Gift, f.2— Dorset Cat. pi. 18. f. 2. 
Trochus conicus. Donovan , pi. 155. f. 1. 
Shell pyramidal, pointed, with a broad base which is 
mostly surrounded by a raised rib *, spires seven or eight, 
I’ily distinguishable by any raised line, each marked with 
5 rea or eight fine circular and slightly beaded lines ; the 
ue rather convex, and circularly striate: color white, 
-c)*, or dull reddish-brown, with often purple longitudinal 
- errupted lines or streaks : aperture nearly square, per- 
: :ou$ within: diameter a quarter of an incli 3 height 
Ltlyhalf an inch. 
1 : is distinguished from the last, by its broad and cari- 
vibase, the want of the crimson tip, the superior num- 
: and fineness of the circular lines on the volutions, in 
perlaceous within the aperture, and in not being so 
undefined at tlie junctures by the beaded margin. 
Western coasts, and Dublin bay: rare. v. in. 
TURBO. TURBAN. 
Shell with a single valve, spiral, solid : aperture 
contracted, more or less orbicular and entire, 
lathe first division of this family it will be observed, 
t‘at we have collected into one point all those shells which 
-•ve the pillar-lip flattened, and are so peculiarly marked 
-ythe groove and terminal perforation, and which have 
itherto been scattered among the Turbo, Helix, and Ne- 
rita 
