Page:American Seashells (1954).djvu/520

422 Tellina laevigata Linne Smooth Tellin Plate 40k Southern Florida and the West Indies. 2 to 3 inches in length, oval to slightly elongate, moderately compressed, strong, with a smooth, glossy surface except for microscopic, radial scratches. Exterior color either whitish or usually faintly rayed, or banded at the ven- tral margins with soft, creamy-orange. Inside polished white to yellowish. Rare in Florida, fairly common in the West Indies. Subgenus Tellinella Morch 1853 Tellina interrupta Wood Speckled Tellin Plate 40I North Carolina to south half of Florida and the West Indies. 2/4 to 3% inches in length, well elongated, moderately inflated, twisted at the posterior end where at the dorsal margin on the right valve there are 2 rough ridges. Concentric threads numerous, evenly spaced. Color whitish with numerous small, prominent, zigzag specklings of purplish brown. Inte- rior yellowish. Not uncommon in southeast Florida, but abundant in some shallow West Indian bays. Tellina idae Dall Ida's Tellin Figures 87a, b; 28h Santa Monica to Newport Bay, California. 2 to 2 34 inches in length, elongate, compressed. With strong, rather evenly spaced, concentric, lamellate threads. Posterior end narrow, slightly twisted and with a rounded, radial ridge near the dorsal margin (in right valve) or a ridge at the dorsal margin and a furrow below it (left valve). Ligament elongate and sunk deeply into the long, deep dorsal-margin furrow. Color grayish white. Moderately common. Subgenus Angulus Miihlfeld 181 1 Tellina agilis Stimpson Northern Dwarf Tellin Plate 30X; figure 86f Gulf of St. Lawrence to North Carolina. Vs to Yz inch in length, moderately elongate, compressed, fairly fragile; glossy-white externally with an opalescent sheen. Interior white. Ligament external and prominent. With a large rounded pallial sinus almost extending to the anterior muscle scar. External sculpture of faint, microscopic, con- centric, impressed lines. Commonly found washed on shore from Maryland north. Formerly known as Tellina tenera Say and Angiiliis tener Say (not