Plate 20c
Alaska to Lower California.
1⁄2 inch in length, moderately slender, semigloss finish and smooth. Color light to dark reddish brown with small, irregular spots of bluish white. Columella white; interior of aperture whitish brown. A common littoral species. Compare with L. planaxis.
Plate 20a
Puget Sound to Lower California.
1⁄2 to 3⁄4 inch in length, usually badly eroded; grayish brown with bluish white spots and flecks. Characterized by the eroded, flattened area on the body whorl just beside the columella. Interior of aperture chocolate-brown with a white spiral band at the bottom. A common littoral, rock-loving species. Do not confuse with the smoother, higher-spired L. scutulata.
Plate 20b
Bering Sea to Puget Sound, Washington.
3⁄4 inch in length, solid, sharp lip, characterized by about a dozen strong spiral threads on the body whorl. Columella whitish. Shell dark grayish to rusty-brown; some with 2 or 3 wide spiral bands of whitish. A common littoral species of the north.
Genus Nodilittorina Martens 1897
Plate 19i
South Florida, the West Indies and Bermuda.
1⁄2 to 3⁄4 inch in length. Shell rounded at the base. Several spiral rows of small, fairly sharp nodules on the whorls. Columella flattened, forming a slightly dished-out shelf. Color brownish gray. Operculum paucispiral. A common rock-dwelling species found near the high-tide line. Do not confuse with the extremely similar Echininus nodulosus Pfr. which has a multi-spiral operculum, and whose columella is not shelved. Erroneously listed in Johnsonia and other books as Tectarius tuberculatus Wood.
Genus Tectarius Valenciennes 1833
Subgenus Cenchritis Martens 1900
Plate 19g
Lower Florida Keys, the West Indies and Bermuda.
