60 
at the upper part; a sinus in the right lip. Operculum 
hornv. 
* T. TEREBRA. Turbo T. Turt. Lin. Pen. Brit. %«■> 
vol 4, pi. 81, fig. 113. Mont. Test. Bril., vol. 2, p. 293- 
Turritella T. Fleiu. Brit. An., p. 302. Sparingly along 
the south coast, from the Land’s-end. 
* T. ELEGANT1SSIMA. Turbo E. Mont. Test. Brit- 
vol. 2, p. 298, pi. 10, fig. 2. Turritella E. Flein. Brit- 
An., p. 303. Montagu found it not uncommon in sand 
from Falmouth harbour, and I have obtained it from th® 
Land’s-end. 
T. NITIDISS1MA. Turbo N. Mont. Test. Brit., vol. A 
p. 299, pi. 12, fig. 1. Flem. Brit. An., p. 304. Montag 11 
found it in sand front Falmouth harbour. 
T. UNICA. Turbo Albidus. Turt. Lin. T. U. Mon- 
Test. Brit., vol. 2, p. 299, pi. 12, fig. 2. Turritella U 1 
Flem. Brit. Ann., p. 303. Rare. In sand from Falmouth' 
by Montagu. 
CANALIFERA. , 
The shell with a canal, variable in length, at the base 0 
the aperture, the right margin of which does not alter by ag e ' 
An operculum. The first division, with no constant wart o 
the right, lip. 
CERITHIUM. 
GENERIC CHARACTER • The shell turreted, aperture 
short, oblong, oblique, the bottom ending in a short o 
curved canal, never notched. A slight channel at tl> 
upper extremity of the right lip. Operculum sinm 1 ’ 
roundish, horny. . 
C. COST ATOM. Strombns C. Mont. Test. Brit., vol. 
p. 225. C. C. Flem. Brit. An., p. 337. Very raV 6 ' 
Da Costa found it in Cornwall. . 
* C. LIMA. Murex Retieulatus. Mont. Test. Brit., vol. 
p. 272. Terebra R. Flem. Brit. An., p. 346. C. Lim' ’ 
Mr. Forbes: a specimen kindly named by him for me. 
is abundant in shell sand near Looe, Fowey, and from 1 ^ 
Land’s-end ; but I have no where seen it so large as ofl 
heap of sand from the river below Truro. 
PLEUROTOMA. • 
GENERIC CHARACTER: The shell turreted or W 
form, ending below in a straight canal, more or ,e 
lengthened ; a fissure in the upper part of the right lip- 
* P. SINUOSA. Murex S. Mont. Test. Brit., vol. y 
p. 264. Flem. Brit. An., p. 354. In shell sand, uC 
Looe, and from the Land’s-end. 
FUSUS. . 
GENERIC CHARACTER: The shell somewhat spum'^ 
shaped, channelled at the base, swelling in the middle^ 
below; no external protuberances; spire elevated 
