366 American Seashells 



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 



