xlvi 
Adversum, 194, _ Lineare, 197. 
Subulatum, 194. | Trevellianum,197,f.51(r) 
PLEUROTOMA (9). Smith, 198. 
Gracile, 195, f. 40. Coarctatum, 198. 
Decussatum, 198. 
Septangulare, 196. Reticulatum, 199. 
Boothu, 196. Metcalfe (s). 
Sinuosum, 195. 
(q) ‘The two first species alone possess the constant 
emargination which should distinguish this genus. The 
others have a more or less distinct sinus, and will pro- 
bably form a subgenus with the first 8 or 9 species of 
the second division of our Fusi, to which they are so 
closely allied that it is impossible with justice to sepa- 
rate them. But as these latter cannot come within the 
definition of Pleurotoma we have provisionally fol- 
lowed Turton in our arrangement. 
(7) Will probably prove but a variety of F. Turri- 
cula, tle depth of the sinus evidently varying in indi- 
vidual specimens. . 
(s) P. Metcarret, Reeve MSS. Elongated-sub- 
fusiform, white, with a single subcentral rather broad 
brownish band on the body-whorl, which runs along 
the base of the others; whorls 5, not raised, but the 
suture distinct ; adorned with 6 broad, strong, and ele- 
