Pvn H,i I'UitlS

88 PECTINID.E.
perforated in the centre and strengthened by
a thick rib : in-
side pearly, closely granular, slightly impressed by the ribs ;
front margin scalloped or fluted in the young and very thick
in the adult: muscular and pallial scars indistinct, especially
the former. L. 1*6. B. 1.
Var. tenera. Shell smaller, narrower, and more depressed,
with fewer ribs. L. tenera, Turton in Zool. Journ. ii. p. 362,
t. xiii. f. 2. L. 1. B. 0-6.
ground, in 12-40 fathoms, very com-
Hard Habitat :
mon in the West of Scotland; Orkneys (Thomas);
Aberdeen (Macgillivray) ; north-east coast of Ireland
(Portlock, Hyndman, and Waller) ; Anglesea (M fAn drew and Forbes) Isle of Man .
; (Forbes) A specimen
from the last-mentioned locality, which I received from
the late Professor Forbes, is intermediate between the
typical form and the variety, as well as a specimen
which Mr. W.W.Walpole sent me from Killiney Bay,
near Dublin. As an upper tertiary fossil it has been
noticed by the late Mr. W. Thompson and Mr. Grainger
in a bed of blue clay at Belfast, and by Mr. Searles
Wood in the Coralline Crag at Ramsholt. The variety
is found on the southern coast of Cornwall and in the
Channel Isles. It is not uncommon at Herm, under
large stones, at low-water mark. The range of this
been re-
variety southward is very extensive, having
corded by numerous authors in different parts of the
Mediterranean, iEgean, and North Atlantic seas, as
far as the Canary Isles, Madeira, and the Azores, at
depths of 0-50 fathoms. The typical or northern form
inhabits
fathoms.
the coasts of Norway and Sweden, in 4-30
Malm found a specimen in the stomach of a
cod-fish.
In Mr. Norman's interesting notices of the Clyde
Mollusca (published in the c
Zoologist' for 1858)
is the
following :— " Nothing can be more lovely than the ani-