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1 10 American Seashells
Subgenus Calliotropis Seguenza 1903
Lischkeia ottoi Philippi Otto's Spiny Margarite
Nova Scotia to Nortii Carolina.
% to % inch in length, equally wide. Moderately thin with a sharp lip.
The round, narrow umbilicus is partially covered by the top of the colu-
mella. Color pearly-white. Sculpture of whorls in spire with 3 evenly spaced
spiral rows of prickly beads. Suture wavy. Base of shell with 4 to 5 spiral
threads which bear smaller, often obscure, beads. Nuclear whorls with axial
lamellae. S. regalis Verrill and Smith is the same species. Common from 50
to 100 fathoms.
Genus Solariella Wood 1842
(Machaeroplax Friele 1877)
Solariella obscura Couthouy Obscure Solarelle
Labrador to off Chesapeake Bay, Virginia.
Figure 3if, g
^ inch in length, similar to Margarites costalis, but with whorls made
more angular by one large, feebly beaded, spiral cord above the periphery.
Base smoothish except for microscopic, spiral scratches. Umbilicus narrower
and bordered by an angular rim. Color grayish to pinkish tan, often worn to
reveal a pearly-golden color. Aperture pearly-white. Some specimens may
have weak axial riblets below the strongest spiral cord on the periphery of the
whorl. Commonly dredged from 3 to 400 fathoms, especially on the Grand
Banks.
Solariella lacunella Dall Channeled Solarelle
Virginia to Key West, Florida.
Figure 32b, c
% inch in length, equally wide, thick, pure white. Whorls convex.
Aperture circular, internally pearly. Suture channeled. Whorls with 6 spiral
cords, bottom 3 smooth, the upper ones axially beaded. Nuclear whorls
glassy, with microscopic axial ribs. Umbilicus round, narrow, deep, lined
with spiral rows of coarse beads. Very commonly dredged from 18 to 100
fathoms.
Solariella lamellosa Verrill and Smith Lamellose Solarelle
Massachusetts to Key West, Yucatan and the West Indies.
Plate 17X
Ys inch in length, similar to 5. lacunella, but with a much deeper channel
at the suture below which are numerous, small axial, short lamellar-like ribs.
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