A marine shell, which, like the Scalaria, has a round aperture, but its
solidity and pearly substance distinguishes it from the Cyclostoma,
which is terrestrial.
Shell thick, pearly in the interior, sub-discoid or conical; the spiral
whorls sometimes detached, rounded, spiny, with a large umbilicus;
aperture round or multrigonal, not modified; edges perfectly united with
a small spire, tuberculated exteriorly.
Delphinula laciniata.
D. distorta.
D. turbinopsis.
_D. laciniata._ The fringed Delphinula. Pl. 23, fig. 5.
Shell depressed, umbilicus large, surrounded by large vaulted scales in
spiral rows; strong waved spiral striæ; colour reddish purple,
variegated with white.
FAMILY XV.
TURBINACEA. Seven genera.