207 
F. 1.—Mont. Sup. p. 117.—Lin. T. 8. p. 149.—D, 
p- 742.—P LEvRoToMA 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 lip concave, 
the outer rounded, base attenuated, canal produced and 
bent slightly to the left. ¢...¢. Sandy Bays. 
F, Fenestratus. Turton. Mag. Nat. His. 7.— 
Oblong-fusiform, ivory white, with numerous longitu- 
dinal ribs which are reticulated by transverse striz ; 
volutions eight, swollen; the tail produced, a little 
turned to the left ; mouth white, smooth; the tip papil- 
lary. 1%...8. 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. Norwecicus. Turton Mag. N.H.7.—StTRomsBvs 
N. Ch. f. 1497,8.—Gmel. 3520.—D. p. 675.—Quite 
smooth, ivory white ; volutions six, rather flat, the lower 
one veltricose ; 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. 
