Pvn H,i I'UitlS

64 PECUNIAE.
portionate size of the ears. A single
valve which I
dredged off Skye in 1847 somewhat resembles Philippics
var. 77. of P. polymorphus ; the front of each valve is
folded inwards and grooved, with the inside margin
finely notched or crenulated. In young shells the surface
is regularly cancellated. The fry is glossy and has
consists of nume-
very prominent beaks ; its sculpture
rous microscopical longitudinal strise on the upper
valve, and equally minute transverse strise on both
valves.
A dozen names have been given by different concho-
logists to this species. If the authority of O. F. Miiller,
the original discoverer, were at all questionable, Gme-
lin's name of hybridus would have the priority over that
of Danicus, which was proposed by Chemnitz nineteen
years after the publication of the Prodromus to the
1
Zoologia Danica/
P. glaber of Pennant and Montagu is a well-known
Mediterranean species ;
and there does not seem to be
that it ever inhabited the
any reason for supposing
Welsh or Scotch coasts, as stated by those authors.
I have a single valve of P. sulcatus, Miiller, which was
dredged off the east coast of Shetland by Mr. Barlee ;
but as it is an imperfect specimen, I do not at present
describe this species as British, but merely offer a short
notice of it. It has thirty-two ribs, besides small inter-
mediate ones ; they are rounded and cord-like, with
thin transverse plates in the interstices. The colour of
my specimen is orange-yellow. The ears are propor-
tionally larger than in P. septemradiatus. The inside
is marked by furrows, which correspond with the ribs
as in P. glaber. The species now noticed inhabits the
Scandinavian seas. A small single valve, in a semi-
fossil state, was taken by Capt. Hoskyns at a depth of