and been washed on shore; if this is the case, it cannot properly
take a place amongst the shells of the Island.
Fam. Nas-sidce.
Cassidea, Brugui&re.
*C. t e s t i c u lu s , Linn.
Nassa, Lam.
in c r a s s a t a , Strom, var.—A very beautiful little white and
brown shell, about a quarter of an inch in length, found amongst
the sand in the pools on the West Hocks, but not alive. I t is
a British species.
Columbella, Lam.
*C. c r i b r a r i a , Lam. (H. and A. Adams).-^A. beautifully-marked,
smooth, brown and white shell, about one-third of an-inch in length ;
found under similar circumstances as the above.
Cominella, Gray.
*C. l u g u b r i s , C. B. Adams.—A small shell, not unlike the last
in appearance, but having an irregular surface; found under similar
circumstances, j
Fam. Muricidai.
Triton, Lam.
* T . v a r i e g a t u s , Lam.—A large conch, about ten or eleven inches
in length; rarely seen. I obtained two living specimens, which
came ashore at Lemon Valley.
* T . o le a r iu m , Linn.—A large yellowish-brown shell, about three
inches long;, found on the Windward Coast, but rarely, and not
living.
Banella, Lam.
*R. c s e la ta , Broderip.—A large yellowish-brown shell, about
two inches long, picked up in a dead state on. the Windward Coast.
I t occurs at Panama.
Murex, Linn.
*M . n. sp.— An irregular rough-shaped shell, about three-fourths,
of an inch in length, found alive in considerable numbers adhering
to the rocks around the coast at high-water mark.
•Fam. Buccinida.
Purpura, Adanson.
* P . rudolphi, Lam.—A shell about an eighth or a quarter of
an inch in length ; found abundantly in a living state adhering to
the rocks around the sea-coast at water-mark.
O r d e r P e c t in ib r a n c h ia t a .
Fam. Patellidce.
Patella, Linn.
* P . c s e ru le a , Lam.—The Blue Limpet of St. Helena, found plentifully
alive and sticking to the rocks on the sea-coast about high-
water mark.
* P . p lu m b e a , Lam.—Pound also alive with the other species.
Tectura, Aud. & Mine. Ed.
* T . v i r g i n e a , Mull.—A minute limpet-shell, of a tortoise-shell
appearance, picked up on the sea-shore.
Hipponyx, Defrance.
*H. m i t r u l a , Lam.—Pound living, but not common, clinging
to the rocks at water-mark on the Windward Coast; a shell about
one-fourth to one-half an inch in diameter.
*H . rad ia tu s, Quoy and Gaimard.—A species similar to but
smaller than the last.
Fam. FissurellicUe.
Pissurella, Bruguiere.
* F . a r c u a t a , G. B. Sow.—A small limpet-shaped shell, picked
up on the sea-shore abundantly, but not alive.
Fam. litforinida.
Littorina, Fer.
* L . h e le n s e .— A small periwinkle, found abundantly alive and
sticking to the rocks all around the sea-coast at and above high-
water mark.
* L . s t r i a t a , King.—Also found alive with the other species.