166 PHYSA. 



gives the shell a deformed appearance. A 

 broad, thick deposit of callus on the body 

 whorl extends to the base of the columellar 

 lip, which is twisted and appressed. 



Length 10, diam. 4 mill. 



Grand Rapids, Mich. 



Subgenus P H Y S E L L A, Haldeman. 



44. PHYSA GLOBOSA, Hahl 



Monog. p. 38, t. 5, fig. 10—12. 



Subgenus P li Y S D N, Haldeman. 



45. PHYSA MICROSTOMA, Hald. 

 Monog. p. 39, t. 4, fig. 13—14. 



'82) 



