PHYSA. 149 



27. PHYSA INFLATA, Lea. 



Plate 8, "fig. 4. 



Shell inflated, dark, somewhat pellucid ; 

 .spire somewhat elevated, acutely conical; 

 whorls five ; outer lip margined and inflated ; 

 aperture wide. 



Length 16, diam. 12 mill. 



Virginia, between the Salt Sulphur and 

 Sweet Springs. 



It is perhaps most nearly allied to Ph. lieie- 

 rostropJia, Say, but has a shorter aperture and 

 is more inflated. — Lea. 



28. PHYSA FRAGILIS, Migneh. • 



Hald. Monog. 31, t. 4, figs. 11—13. 



Shell very thin and fragile, translucent, 



horn-color, obliquely ovate ; whorls four ; last 



whorl campanulate, suture deeply impressed 



at the enlargement of the last whorl ; spire 



i65> 



