Page:American Seashells (1954).djvu/166

116 1 inch in length, similar to doliarium, but with smaller cords which are strongly beaded; nucleus pink; the sides of the spire slightly concave, and the periphery of the last whorl rounded. Uncommonly dredged in 15 to 400 fathoms

1 inch in length, not quite so wide, rather light, with about 10 ﬁne, spiral threads between sutures. The upper 5 are inclined to be minutely beaded. Periphery of last whorl moderately sharp. Columella white, fairly thick and with a swelling at the lower $2/3$. Nuclear whorls white. Color of shell yellowish brown with darker purplish brown, slanting and rather elongate spots arranged in 2 spiral series. Moderately common in shallow water.

$1/4$ to $1/3$ inch in length, equally wide, with about 5 to 6 whorls which bear between sutures 5 strong spiral cords. The upper 2 or 3 are ﬁnely beaded, the lower 2 or 3 are smooth and cord-like. Between the cords, the shell is brilliant orange-iridescent. General color a yellowish orange with large white maculations on the upper half of the whorls. Moderately common offshore, uncommonly washed ashore.

$3/4$ to 1 inch in length, equally wide, rather heavy; whorls quite well rounded; characterized by smooth, spiral, light-tan cords (6 to 8 on the spire whorls) on a background of chocolate. Sometimes flushed with mauve. No umbilicus. Aperture usually pearly-white. A very common littoral species from northern California north. Formerly C. costatum Martyn.

There is only one species &ensp;in [sic] this genus, namely L. pica from the West