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TELLINIDAE 421
pointed and slightly uplifted. Interior blushed with mottlings of chestnut
to purplish brown.
Rupellaria carditoides Conrad Hearty Rupellaria
Vancouver, B.C., to Lower California.
1 to 2 inches in length. Very variable in shape, usually oblong; in some,
squat and almost orbicular. Shell white to grayish white and very chalky in
texture. Concentric growth lines quite coarse and irregular. Radial sculpture
of pecuhar, fine, scratched lines crowded together, but worn away in some
specimens. Fairly common. Found boring into hard rock. Nepionic shell
usually oblong. R. californica Conrad is the same.
Subfamily COOPERELLINAE
Genus Cooperella Carpenter 1864
Hinge plate narrow, with 2 right and 3 left short, divaricating cardinals
under the beaks. The left central cardinal is always, and the others com-
monly, split or bifid. No laterals. Muscle scars small and oval. Pallial line
narrow, the sinus long.
Cooperella subdiaphana Carpenter Shiny Cooper's Clam
Southern California to Lower California.
About % inch in length, oval-oblong, opaque-white with a brilliant gloss
and slight opalescence. Fragile. Outer surface with slightly wavy concentric
growth lines. Ligament tiny, short, set just behind the beaks and visible ex-
ternally. Moderately common offshore to 40 fathoms.
Superfamily TELLINACEA
Family TELLINIDAE
Genus Tellina Linne 1758
Subgenus Tellina s. str.
Tellina radiata Linne Sunrise Tellin
South Carolina to south half of Florida and the West Indies.
Plate 4oe
2 to 4 inches in length, elongate, moderately inflated. Characterized by
its oily smooth, glistening surface and rich display of colors—either creamywhite
or rayed with pale-red or yellow. Interior flushed with yellow. The
beaks are usually tipped with bright-red. Uncommon in Florida but abundant
in the West Indies.