Pvn H,i I'UitlS

CARDIUM. .273
3. C. tuberculatum *, Linne.
C. tuberculatum, Linn. Syst. Nat. p. 1124. C. rusticum, F. & H. ii. p. 11,
pi. xxxi. f. 3, 4.
Body reddish-yellow : mantle thickened and notched on the
posterior side : tubes fringed with cirri : foot long
crimson colour.
and of a
Shell resembling that of C. echinatum ; but it is larger, and
much more globular and solid ; the sculpture is coarser, and
there are 21 or 22 ribs ; the spines are more like tubercles,
those on the anterior side being spatulate, or flat and trans-
versely triangular, while those in front and on the posterior
side are very short and bluntly conical : colour yellowish-brown
with a tinge of red, often disposed in beautifully variegated
zones or bands : margins in front remarkably contracted or
pinched in, so as greatly to increase the convexity of the shell.
It does not differ in other particulars from C. echinatum.
L. 2-9. B. 3-2.
Habitat : Cornwall, Devon, and Dorset, in sandy
bays, from low water at spring tides to 12 fathoms;
Guernsey (Lukis) ; . Bantry Bay (Humphreys) Leach
says, "abundantly in the Firths of Forth and Clyde,
Yawl [Youghal], Bantry, Cork, and Dingle Bays, Ire-
land ;" but I fear he has confounded this species with
C. echinatum. Newer pliocene, Worcestershire (J. Smith) ;
Sussex tertiaries (Godwin-Austen). It has not been
recorded from any place north of Great Britain \ but
its range southward extends from Finistere to Vigo,
Madeira, and the Canary Isles, as well as throughout
the Mediterranean as far as Sicily.
Young shells are very pretty. They are invariably
coloured like the adult, the ribs are covered with white
calyciform tubercles, and the transverse markings form
near the beaks a fine and regular lattice-work. A single
valve in Dr. Turton's collection is obliquely elongated at
* Covered with tubercles.
n5