equidistant reddish brown irregularly shaped spots 5 
whorls flat, with five or six minute tuberculated spiral 
ridges, the lower one the strongest; apex acute, suture 
distinct, base imperforate flat, subconcave, with nume- 
rous concentric tuberculate ridges; aperture nacreous, 
compressed. 0,80. Islesof Man, Dublin, §e. 
Genvs.-- TURBO. 
Conoid or subturrited, the periphery never compressed; 
aperture entire, rounded, not modified by the penult 
whorl, the margin disunited above ; pillar arcuated 
flattened and not truncated at the base, an oper- 
culum. 
T. Littorevs. Lin. 1232.—List. ¢. 585. f. 43.— 
Lam. 24.—D. p. 817.—Born. t. [2. f. 13,4.—Mart. 
Jf. 1852.—Inst. An. p. 162.—Mont. p. 301.—E. p. 
298.—Ovate, imperforated, thick, transversely striated, 
vatiable in colouring, often yellowish grey often with 
narrow bands whorls five, the separating line shallow, 
the whorls, except the [last little convex; outer lip 
joining the body at an acute angle; columella white, 
throat chocolate brown. Variety—scarlet. 0,80. Com- 
mon Periwinkle. 
T. Perraus. F. p. 298.—D. p. 820.—He tx P. 
Mont. p. 403.—Strong conical, opaque, purplish brown, 
