Figure 31d
Arctic Seas to Massachusetts Bay.
1⁄2 inch in length, 3⁄4 inch in width. Angle of spire 110 degrees. Whorls strongly rounded, aperture round, umbilicus wide and deep. Outer lip and columella very thin. Base smooth; top of whorls with about a dozen smooth spiral lirations or almost entirely smooth (form umbilicalis Broderip and Sowerby). Nucleus glassy smooth. Suture finely impressed. Color glossy-cream to tan. Aperture pearly. Commonly dredged from 5 to 150 fathoms.
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Figure 31. American Margarites. a, Margarita succinctus Cpr., 1⁄8 inch (Pacific); b, Solariella permabilis Cpr., 1⁄2 inch (Pacific); c, Margarites pupillus Gould, 1⁄2 inch (Pacific); d, M. groenlandicus Gmelin, 1⁄2 inch (northern Atlantic); e, M. lirulatis form parcipictus Cpr., 1⁄4 inch (Pacific); f and g, Solariella obscura Couthouy, 1⁄4 inch (Atlantic); h, Lischkeia cidaris Cpr., 1 inch (Pacific).
Figure 31e
Santa Barbara, California, to the Coronado Islands.
1⁄4 inch in length, 4 to 5 whorls, strong, semi-glossy. Very variable in color (solid purple, whitish with dark-brown variegations and sometimes with a spiral row of dark squares on the periphery), and variable in the number and strength of the small, smooth, spiral cords. Base rounded. Umbilicus narrow but deep. Suture well-impressed. Interior iridescent. Common in shallow water. M. parcipictus Cpr. and obsoletus Cpr. are forms of this species.
