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108 American Seash ells
Margarites groenlandicus Gmelin
Arctic Seas to Massachusetts Bay.
Greenland Margarite
Figure 3id
H inch in length, % inch in width. Angle of spire 1 1 o 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 glossycream
to tan. Aperture pearly. Commonly dredged from 5 to 150 fathoms.
Figure 31. American A4argarites. 3l^ Margarites siiccinctiis 0^^:.,% inch (Vdici^c);
b, Solariella perainabUis Cpr., ^. inch (Pacific); c, Margarites piipilhis Gould, %
inch (Pacific); d, M. groenlandicus Gmelin, V^ inch (northern Atlantic); e, M.
liridatiis form parcipictiis Cpr., 14 ii^ch (Pacific); f and g, Solariella obsciira
Couthouy, 4 inch (Atlantic); h, Lischkeia cidaris Cpr., i
inch (Pacific).
Margarites lindatus Carpenter
Santa Barbara, California, to the Coronado Islands.
Lirulate Margarite
Figure 3ie
^ 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 num-
ber 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.