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 C S T A T E L L A, Dall. 



49. PHYSA COSTATA, Newcomh. 

 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. 

 (84) 



