207 



/. I. Mont. Sup. p. 117. Lin. T. 8. p. 149. /), 

 p, 742. PLEUROTOMA B. Macg. Aber. p. 171. 

 Whorls six, rounded, white or rufous, with numerous 

 longitudinal plaits which in young shells are raised and 

 sharp especially at the suture, sometimes with indistinct 

 spiral ridges ; aperture rounded, the inner ]ip concave, 

 the outer rounded, base attenuated, canal produced and 

 bent slightly to the left. |...f. Sandy Bays. 



F. FENESTRATUS. Turton. Mag. Nat. His. 7. 

 Oblong-fusiform, ivory white, with numerous longitu- 

 dinal ribs which are reticulated by transverse striae; 

 volutions eight, swollen; the tail produced, a little 

 turned to the left ; mouth white, smooth ; the tip papil- 

 lary. li...f. Cork. In shape resembling Corneus, 

 but the whorls are much more rounded and deeply 

 divided, the tail not so elongated, the reticulations 

 rather coarse and slightly granular. 



F. NORWEGICUS. Turton Mag. N.H. 7. STROMBUS 

 N. Ch.f. 1497,8. Gmel. 3520. D. p. 675. Quite 

 smooth, ivory white ; volutions six, rather flat, the lower 

 one ventricose ; aperture twice as long as the rest of the 

 shell and pure white ; outer lip much dilated and smooth 

 on the inner margin, the edge sharp and slightly re- 

 flected; pillar smooth. 5... 2. Scarborough. 



