Pvn H,i I'UitlS

TELLINA. 389
side is not
parent rays on a white ground : the posterior
flexuous, gaping, produced, or angular, but abruptly truncate
and somewhat rounded : both of the lateral teeth in the right
valve are near the beak, instead of the posterior lateral being
placed at a distance from it, owing
side in the two species. L. 0-2. B. 0-35.
Habitat :
to the relative extent of that
Sandy ground, at depths of from 3 to
85 fathoms, on most of our coasts. I will enumerate
a few localities :— Balta Sound and the deep sea or
11 outer haf " in Shetland (J. G. J.) ; Orkneys
and north
of Scotland (M'Andrew) • west of Scotland (Bedford
and others) \ Cork (Humphreys) ; Galway (Barlee) ;
Dublin Bay (Walpole and Kinaghan) ; Coquet and
Berwick Bay (Mennell) ; Holy Island, Northumberland
(Alder) ; Fowey (Barlee) ; Land's End (Hockin and
Mus. Turton.) ; Plymouth, Exmouth, and Channel Isles
(J. G. J.). It is not uncommon on the Scandinavian
coasts, from West Finmark to Bohuslan,
in 10-25 fa-
thoms ; but it does not appear to have been found or
noticed south of Great Britain. Philippi
first described
it as a fossil of the Sicilian tertiaries, adding te in Ger-
mania, ad Casselam, Freden, &c."
The shell exhibits in every stage of growth the marks
of difference above specified with regard to T. donacina ;
and I have never seen any intermediate specimens. Yet
such may exist. It is somewhat suspicious that the
present species is only found north, and the other south
of Great Britain. Both conjointly seem to inhabit no
other coasts but our own. Further investigations may
clear up the point as to the specific value of T. pusilla.
Philippi must have inadvertently communicated to
Loven the MS. name of 9t
pygm&a," this species having
been published by the former in 1836 as "pusilla"
The T. calcarea of Chemnitz == T. lata, Gmelin = T.
sabulosa,S])eT\g\eY-= T.inco?ispicif a, Uroderi]) and Sowerby