Page:American Seashells (1954).djvu/429

Rh 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 Figure 73 Santa Barbara Islands to Coronado Island, California. 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 Plate zji Cape Cod to Florida, the Gulf States and the West Indies. % inch in length, strongly oblique, with prominent, rounded ribs which