168 PHYSA. 
48. PHYSA SCALARIS, Jay. 
Hald., Monog. p. 34, t. 4, f. 9. 
See my remarks on the subgenus Ameria, 
ante p. 126. 
Specimens have been collected at Tampa 
Bay, Florida. 
Subgenus COSTA TELLA, Dall. 
49. PHYSA COSTATA, Newcomb. 
Plate 7, figs. 10, 11. 
Shell ovate globular, horn-color or reddish 
corneous; whorls four, the last inflated and 
roundly angulated above, armed with ten to 
fourteen prominent longitudinal ribs; apex 
acute ; spire short; aperture ovate. 
Clear Lake, California. 
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