197 



P. LINEARIS. Turton.< MUREX L. Mont. p. 261. t. 

 t. 9./ 4. Lin. T.S.p. 148. D.^. 745. Fusus L. 

 F.p. 350. M. ELEGANS. Don. t. 179. /. 3. Subfu- 

 siform, turreted ; whorls seven or eight, rounded, light 

 brown, with nine or ten ribs crossed by elevated striae or 

 ridges, the summits of which are purplish brown and 

 form fine spiral thread-like lines (the ridges are rarely 

 uniform brown) up to the acute and dark (usually pur- 

 ple) apex ; aperture oval, terminating in a straight 

 canal, outer lip thickened at the back by a rib, inner 

 margin crenated. f...&. Devon and Cornwall. 



P. CHORDULA. Turton. MUREX C. Turt. D. p. 

 350. Fusus C. F. p. 350. Conic, brown, a little 

 tapering to a rather obtuse point; whorls five; rounded, 

 the body occupying more than half the length ; spirally 

 striated and adorned with fifteen wire-like contiguous 

 ribs which bend in the middle towards the outer lip ; 

 aperture narrow oval, ending in a short canal ; outer 

 lip thickened externally by a rib. 0,1 7... 0,06. Drifted 

 sand, Dublin Bay. 



P. TREVELLIANUM. Turton. in Mag. Nat. Hist. 



7. p. 350. Macff. Aberd. p. 172 Oval, fusiform, 



yellowish white, with six or seven volutions which are 

 very closely striated and flattened at their tops ; mouth 



