THE CLAM Genus PLATYODON, Conr.
Shell unequal, gaping, squared at both ends, ventricose; hinge sub-central, with broad tooth; surface cross-striated and circled with growth lines; faint groove from apex to ventral mar gin; siphons united, closed by four hard plates.
The Cross-barred Broad-tooth Clam (P. cancellatus. Conr.) somewhat resembles the "soft-shell" of Mya. The white
surface is checkered by fine intersecting ridges. Its hinge tooth is broad and spoon-shaped. The dilated, valved end of the siphon tube distinguishes it beyond question. The thickness of the shell and the bulging of the valves below the beaks are noticeable char acters. Length, 2 to 3 inches.
Habitat.— California.
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