Pvn H,i I'UitlS

296 CARDTID^E.
what he
at Breydon, near Great Yarmouth, containing
considers " redeposited " Crag shells. Its foreign habi-
tation comprises the Faroe Isles, Finmark, and all the
intervening coasts to the iEgean, Madeira, and the Ca-
naries.
Specimens which I dredged in Bantry Bay measure
about 3 inches in length, and nearly as much in
breadth. Single valves found by Sars in Christiansund
are of the same dimensions ; and some living specimens
taken by Martin in the Gulf of Lyons are scarcely in-
' '
"
ferior in size. It is the large high-beaked cockle
of Wallis, and the " smooth cockle " of Pennant.
This shell was for a long time considered by British
authors to be the C. laevigatwn of Linne ; but his very
short description in the Catalogue of the museum of
Queen Louisa Ulrica (upon which that in the twelfth
edition of the '
Systema
Naturae '
was founded)
states the
colour as reddish spotted with white > a character inap-
plicable to the present species. No locality is given ;
and there are several allied species in the same section,
any one of which might have been intended by Linne.
Our shell was more probably his C. serratum, as well as
Lamarck's species of that name. It would have been
strange if Linne did not know this common shell. How-
ever, the name proposed by Spengler is now generally
accepted.
It is the Pectunculus maximus &c. of Lister,
C, crassum of Gmelin, C. oblongum of Brown (but not
of Chemnitz) as well as of Reeve, and also the C. Pennantii
and C. vitellinum of the last-named writer. The
C. medium of Turton (but not of Linne) is the fry of
C. Norvegicum, judging from his typical specimen. The
genus Lavicardium of Swainson represents
this section
of Cardium, the synonymy of which is sadly confused.
C. muricatum and C. medium of Linne,
C. citrinum