Page:American Seashells (1954).djvu/165

Rh $3/4$ to 1 inch in length, heavy for its size; whorls angular, with the upper third slightly concave to flat and the somewhat angular periphery flattish. Early whorls with minutely beaded threads, later whorls with ﬁne, smoothish cords of various sizes. Nucleus tan to whitish. Color yellowish brown with a few spiral lines of alternating brown and white bars. Sometimes axially variegated. Dredged just offshore from 8 to 35 fathoms. Moderately common.

$3/4$ inch in length, not as wide; characterized by its dark gray-green color and two extra-strong, beaded spiral cords. There are also 3 or 4 minor cords that are not so heavily beaded. Nucleus dark-tan. Moderately common in the littoral zone on rocks and wharf pilings.

$1/2$ inch in length, solid, glossy; characterized by numerous, ﬁne, spiral cords which are sometimes weakly beaded, and by a wide, rather flattish periphery. Nucleus tan. Color light yellowish brown, commonly with a spiral row of subdued white spots at the lower periphery. Interior brightly nacreous. Moderately common on rocks at low tide.

$1/undefined$ to $1 1/4$ inch in length, not quite so wide; characterized by its light weight, golden-yellow color with a mauve band at the periphery, and by the numerous, spiral rows of tiny, distinct beads (5 to 9 rows in the spire whorls). Nucleus pink. Dredged offshore and occasionally washed ashore. Formerly C. annulatum Martyn.

1 to $1 1/2$ inches in length, not heavy, sides of whorl flat. Periphery of the last whorl sharp. Base of shell almost flat. Characterized by sharp, prominant, slightly beaded, spiral cords. Color yellowish tan. Nuclear whorls white. Moderately common offshore. Found on floating kelp weed. Formerly known as C. canaliculatum Martyn, and doliarium Holten 1802.