53 
l >ons on the inner face of the right margin. Opercu»„~. 
with a projecting tooth. 
N. LITTORALIS. Turt. Lin. PeD. Brit. Zo., vol. 4, 
P'- 87, fig. 143. Mont. Test. Brit., vol. 2, p. 467- Stew. 
Elem., vol. 2, p. 417. Flem. Brit. An., p. 318. Abun- 
dant. The Turbo Neritoides, as marked in the collection 
the Museum, from the Mediterranean, is too clearly 
'ike a variety of this shell wiLh alternate broad stripes of 
yellow and brown in the direction of the whorls crossed 
hy zigzag markings of the same, to admit of a doubt as to 
their identity with those found on our shores; but in the 
shell at least, there is not sufficient grounds for considering 
them as forming a distinct species. 
NATICA. 
GENERIC CHARACTER: The shell subglobular, um- 
hilicated; aperture entire, semicircular ; left lip oblique, 
not toothed, callous ; the callosity modifying the umbilicus, 
!>nd sometimes covering it; right lip acute, always smooth 
•Oside. An operculum. 
GLAUCINA. Nerita G. Turt. Lin. Pen. Brit. 
Zo., vol. 4, pi. 87, fig. 141. Mont. Test. Brit., vol. 2. 
P. 469. Stew. Elem., vol. 2, p. 417. Natica G. Flem. 
Erit. An., p. 319. N. Monilifera. Forbes, Fauna Mo- 
nensis, p. 29. Common of small size ; but 1 have never 
l^een it so large any where else as at Par. 
ALDERI. Forbes, Fauna Monensis, p. 31. This 
species has been lately discovered, as distinguished from 
the last, with the young of which it has been confounded. 
-|Tw° specimens were procured from near the Land’s-end. 
’• NlTIDA. Flem. Brit. An., p. 319. A single specimen 
w as obtained from near the Land’s-end. For the two last 
Earned species, as well as several other of the smaller 
s Pecies of Cornish shells, I am indebted to the kindness of 
Mr. William Curnow, Gardener, of Newlyn; who has 
* collected them with persevering industry. 
A- PALLIDULA. Nerita P. Turt. Lin. Mont. Test. 
Evil., vol. 2, p. 468. Stew, Elem., vol. 2, p. 418. Flem. 
Erit.. An., p. 320. Not common. I found a specimen at 
* Falland sand. 
LACUNA. Helix L. Mont. Test. Brit., vol. 2, 
p - 423, pi. 13, fig. 6. Natica L. Flem. Brit. An., p. 320. 
Scarcely common. 
I AN THINE A. 
c ^'e shell inflated, conoidal, thin ; aperture triangular. 
j. 0l Umella straight, projecting beyond the base of the right 
p ; which has a sinus in the middle. No operculum. 
