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LIMOPSIDAE 347
angular. Mostly deep water. Four species on the Pacific Coast, about six on
the Atlantic side.
Figure 73. Limopsis diegensis Dall, % inch (California), a, interior of valve; b,
exterior, showing the fur-like periostracum.
Limopsis diegensis Dall San Diego Limopsis
Santa Barbara Islands to Coronado Island, California.
Figure 73
Vs to Yz inch in length, obhquely oval. Shell white; exterior glossy
white with concentric striae, often studded by tiny pinpoint holes. Radial
scratches present. Periostracum heavy, tufted with hairs, and often with
a cancellate pattern. Uncommonly dredged below 20 fathoms.
Limopsis cristata Jeffreys Cristate Limopsis
Cape Cod to southeastern Florida.
% inch in length, similar to sulcata but much smaller, less tufted with
periostracum, with the inner margin of the valves having a series of strong,
pimple-like nobs or teeth, and the outside of the shell having its radial sculp-
ture stronger than its faint concentric sculpture. Commonly dredged off
Florida.
Limopsis minuta Philippi (Newfoundland to both sides of Florida) is
very close to this species but has cancellate or beaded sculpture and attains
a length of H inch. The shells of L. ajitillensis Dall (Florida to the Lesser
Antilles) are % inch in size and unique in being brightly colored with pink,
orange or yellow.
Limopsis sulcata Verrill and Bush Sulcate Limopsis
Cape Cod to Florida, the Gulf States and the West Indies.
Plate zji
% inch in length, strongly oblique, with prominent, rounded ribs which