download pdf

372 American Seashells
shell is attached to a rock or wood surface by means of a calcified byssus
which passes through a large notch in the right valve. The genus Pododesmus
differs in having only 2 muscle scars in the top or holeless valve.
Anomia simplex Orbigny Common Jingle Shell
Cape Cod to Florida, the Gulf of Mexico, and the West Indies.
Plate 35k
I to 2 inches in size, irregularly oval, smoothish, thin but strong. The
upper or free valve is usually quite convex; the lower valve is flattish and
with a hole near the apex. Color either translucent-yellow or dull-orange.
Some with a silvery sheen. Specimens buried in mud become blackened.
Very commonly attached to logs, wharfs and boats.
Anomia aculeata Gmelin Prickly Jingle Shell
Nova Scotia to North Carolina.
Rarely exceeding % inch in size, irregularly rounded, moderately fragile.
Upper valve convex, rough, often with small prickles. Lower valve flat and
with a small hole near the hinge end. Color drab, opaque whitish tan. A.
common cold-water species attaching itself to rocks and broken shells.
Anomia peruviana Orbigny Peruvian Jingle Shell
San Pedro, California, to Peru.
Plate 296
I to 2 inches in size, variable in shape, thin, partially translucent, smooth
or with irregular sculpture; colored orange or yellowish green. Occurs between
tides attached to rocks, other shells and waterlogged wood. Common.
Genus Pododesmus Philippi 1837
The valve without the hole has i large and i small muscle scar.
Pododesmus macroschismus Deshayes False Jingle Shell
Alaska to Lower California.
Plate igdi
I to 4 inches in size. Radiating ribs very irregular and coarse. Color
yellowish or greenish white, inner surface green and somewhat pearly. Lower
valve with a large opening for the byssus. This is a very common species
which is found attached to stones and wharf pilings from low-tide mark to
about 35 fathoms. Often found on Haliotis. P. cepio Gray is a synonym.
Pododesmus rudis Broderip from Florida and the West Indies is very