The Broad-tooth 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 margin; 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 characters. Length, 2 to 3 inches.

Habitat.-California.