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Rh Subjainily NATICINAE Genus Natica Scopoli 1777 Subgenus Naticarius Dumeril 1806

Natica canrena Linne Colorful Atlantic Natica Plate 5I

North Carolina to Key West and the West Indies.

I to 2 inches in length, glossy-smooth, except for weak wrinkles near the suture. Color pattern variable; sometimes with axial, wavy, brown lines and with 4 spiral rows of arrow-shaped or squarish brown spots. Umbilicus and its large round, internal callus white. Exterior of hard operculum with about 10 spiral grooves. Uncommon in eastern Florida; common in the West Indies.

Natica livida Pfeiffer Livid Natica Plate 22-0

Southeast Florida, Caribbean and Bermuda.

% inch in length, glossy-smooth, exterior lead-gray with vague, spiral, darker-gray bands. Aperture and columella brown; callus which almost fills the umbilicus characteristically dark to light chocolate-brown. Moderately common on intertidal sand flats. Do not confuse with Folinices duplicatus, which is much flatter and has a corneous operculum, but which also has a brown to purplish brown callus.

Subgenus Cryptonatica Dall 1892

Natica clausa Broderip and Sowerby Arctic Natica Figure 43b

Arctic Ocean to North Carolina. Arctic Ocean to off southern Cali- fornia.

I to I % inches, in length, fairly thin, smooth, yellow-white, with a smooth, gray to yellowish-brown periostracum. Umbilicus sealed over by a small, flat callus. Operculum, calcareous, thin, slightly concave, smooth, white and paucispiral. Commonly dredged in moderately deep water, and occasionally found intertidal north of Massachusetts. The sand-collar egg- case has smooth edges, and has a pimpled surface caused by the small com- partments of young.

Natica pusilla Say Southern Miniature Natica Plate 22)

Cape Cod to Florida, the Gulf States, and the West Indies.

/4 to Va inch in length, glossy-smooth, similar to clausa, but more ovate, often with a small, open chink next to the umbilical callus, and is a much