326 MOLLUSCA. 



F. propinqims, Alder. 

 Bantry, Mr. Jeffreys. 



Genus Pleurotoma. 



P. Boothii, Smith (sp.). "Wern. Mem. viii. part 1. 

 A specimen has been obtained at Portmamock by Mr. Warren. 



P. turricula, Mont. 

 Of general occurrence. 



P. costata, Penn. 

 East, West, and South of Ireland. 



P. septangularis, Mont. 

 Generally distributed. 



P. attenuata, Mont. 

 General, but not abundant. 



P. nebula, Mont. 

 North, East, and South of Ireland. 



P. rufa, Mont. 



Shell fusiform, turretted, with eight volutions ; eleven ribs (on body 

 whorl), with coarse deep spiral strise. 



Length 7 lines ; breadth, just above aperture, 2^ lines ; volutions very 

 slightly ventricose, rather flattened at top, but less so than in .P. 

 turricula ; ribs strong and coarse, " not continuous from whorl to whorl ; " 

 coarse cut strise across ribs and furrows ; aperture crescentic ; outer lip 

 thin and in form of a bow ; pillar-lip somewhat hollowed ; canal very 

 short. 



Colour uniform dirty brown. 



This species, coarse in form and sculpture and plain in colour, closely 

 approximates Pleur. hraclvjstoma, Philippi, Enum. Moll. Sicilise, vol. ii. p. 

 169, pi. 26, f. 10 ; from which I could not regard it as distinct, but for a 

 single character possessed by that species in raised spiral strise. These 

 are apparent in the profile of the shell as figured by Philippi ; they are 

 much more numerous too than the deep strise of Pleur. Ulidiana. 



Three specimens of this shell were di-edged from a depth of about 8 to 

 10 fathoms by Mr. Hyndman and myself, in Oct., 183J, in Strangford 

 Lough, County Do'svn. 



P. linearis, Mont. 

 Generally distributed. 



P. purpurea, Mont. 

 Of general occurrence. 



P. gracilis, Mont. 

 Portmarnock and Bray, rare. 



P. sinuosa, Mont. 

 On the East coast, according to Turton. 



