275 



ndges; the firft of thefe in each volution is larger, and 

 more prominent than the reft, and ferves to mark their di- 

 vifions: colour livid, or reddifli ; in fome darker, and oi 

 a purplifh hue, flreaked with longitudinal, broad, waved 

 lines of a deeper fliade, which are moft diftincl on the 

 larger ridge, at the bottom of each volution : aperture 

 fomewhat comprefTcd, angulated : infide nacred : bafe 

 flattifli, with circular ridges, generally of a paler colour 

 than the reft of the (hell, and without fpots ; imperforated. 



The upper volutions are frequently finely tuberculated, 

 but not eafily perceived by the naked eye. 



It is a common fpecies on many of our fhores ; plenti- 

 ful about Marazion in Cornzvall, and on the coaft of 

 South Devon; frequently found with Turbo littoreus, 

 adhering to ftones, between high and low-water mark. 

 Length one inch ; breadth at the bafe nearly the fame. 



Animal yellowifh, mottled with reddifli-brown ; tenta- 

 cula filiform, rufous-brown, paler beneath; eyes pedun- 

 culated; on each iide the body above the fuftentaculum, 

 four very fmall filiform appendages on each fide. 



2. 



Trochus fragilis. Viilt. Cat. Dorfet. p. 44. Tenuis 



Trochus papillofus. Da Cojia. p. 33. t. 3. f. 3 ? T I in f 3 



Gmlt. t. 61. G. M. 

 Troclms Granatum. G;w/. iSy^. p.35S4? — Turt.Lin iv.p.476? 



Chem. Conch, v. t, 170. f. 1634—5 ? 



N n 2 T. with 



