Page:American Seashells (1954).djvu/116

98 $3/4$ inch in length, similar to aspera, but smaller, with a lower, more rounded apex, with convex sides, a narrower shell, and with finer, much neater cancellate sculpturing. Color white or with few, or many, broken radial rays of gray-black. The apical hole is nearer the anterior end. Moderately common on rocks. This is D. densiclathrata of authors, not of Reeve.

Shell thin, low-conic, with the apex in front of the middle. Orifice rather large, roundish. Margin finely crenulated. Fleshy mantle covers most of the shell; foot larger than shell.

$3/4$ inch in length, oblong in outline. With about 60 alternating large and small radiating ribs. Also with 9 to 13 raised, concentric threads. Color white to buff, with 7 to 9 small, splotched rays of pale brown. Inside whitish; callus sometimes bounded by an olive-green streak. Outside of orifice not stained. Uncommon under rocks at low tide zone. It has been erroneously called L. adspersa Philippi.

1 to $1 1/2$ inches in length, oblong in outline. Much like L. sowerbii, but larger, a delicate mauve to pinkish, and with a bluish-black orifice. Inside grayish to dirty-white. Not uncommon under rocks. Formerly called L. cancellata Sowerby.

Shell depressed, conical, less than $3/4$ inch, with a large orifice and thickened margins.

$1/3$ inch in length, resembling L. sowerbii, but smaller with a proportion-