PHYSA. 



153 



31. PHYSA LATA, Tryov. 

 Plate 8, fig. 11. 



Shell very fragile, light horn-color, wax}', 

 irregularly striate ; spire moderately elevated ; 

 whorls convex; apex acute; suture well im- 

 pressed ; body inflated ; aperture rather large, 

 columellar lip turned to the right, very nar- 

 row, distinctly folded. 



Length 10-5, diam. 7 mill. 



Juniata River, Hollidaysburg, Penna. 



This species has very much the form of Ph. 

 heterostropha, but is rather more ventricose, 

 much thinner, and the surface exhibits a pe- 

 culiar glimmering lustre. It is more like Ph. 

 osculans, Hald., in its texture, color, and lustre, 

 but the latter is a much larger species. 



(69) 



