Page:American Seashells (1954).djvu/448

Genus Placopecten Verrill 1897 Placopecten magellanicus Gmelin Atlantic Deep-sea Scallop Plates 33c; 27m Labrador to Cape Hatteras, North Carolina. 5 to 8 inches in size, almost circular. Valves almost flat to slightly convex. Interior flaky-white. Exterior rough with numerous very small, raised threads. Exterior yellowish gray to purplish gray or dirty-white. This is the common, edible, deep-sea scallop fished off our New England coasts. The name grandis Solander is nude and cannot be used. Genus Lyropecten Conrad 1862 Subgenus Lyropecten s. str. Lyropecten antillarum Recluz Antillean Scallop Plate 34g Southeast Florida and the West Indies. % to % inch in length and width. Valves fragile, both nearly flat. Only about 15 moderately rounded, low ribs. Growth lines exceedingly fine (seen with the aid of a strong lens). Color either pastel-yellow, tawny- orange or light-brown, commonly with chalk-white mottlings, flecks or stripes. Found uncommonly in shallow water. Subgenus Nodipecten Dall 1898 Lyropecten nodosiis Linnc Lion's Paw Plate 33b North Carolina to Florida and the West Indies. 3 to 6 inches in size, rather heavy and strong-shelled. Characterized by the 7 to 9 large, coarse ribs which have large, hollow nodules. The entire shell also has numerous, much smaller, but distinct, riblets. The color is commonly dark maroon-red, but may be bright-red or orange. Fairly com- mon offshore, especially on the west coast of Florida, Genus Aeqiiipecten P. Fischer 1887 Subgenus Aeqiiipecten s. str. Aequipecten glyptus Verrill Tyron's Scallop Plate 33a South of Cape Cod to the Gulf of A4exico. I to 2/4 inches in size. Both valves rather flat. Shell somewhat lop- sided and spathate in shape. About 17 ribs which start out as fine, sharp, slightly prickled ribs, but become flattened and indistinct or absent near the