[36 ] 

 5. Hyalina caduca, Pfeiffer. 



Plate 3, figure 15. 



Depressed-globose; whorls 5, rapidly increasing, striate, 

 polished, light yellowish with a tinge of green ; aperture sub- 

 rotund, umbilicus moderate. 



Diam. 25, height 13 mill. 



Texas, Mexico." 



Lighter colored than H. lucuhrata, but doubtfully distinct 

 from it. 



6. Hyalina fuliginosa, Grifiith. 



Plate 3, figure 16. 



Depressed globose; whorls 4|-, rapidly increasing, with 

 irregular oblique wrinkles, smooth, shining, suture slightly 

 impressed; aperture transversely subrotund, terminations of 

 margin approaching ; umbilicus moderate. Color dark horn 

 or chestnut. 



Diam. 25 mill. 



"Western part of the Atlantic States, Western and Southern 

 States. 



Approaches S. laevigata, but is smoother, more polished, 

 more depressed, iimbilicus larger, aperture more rounded. 

 Differs in color from H. caduca and H. lucuhrata. 



7. Hyalina kopnodes, Wm. G. Binney. 



Plate 4, figure 21. 



Depressed globose, wrinkled, below smooth, suture mode- 

 rate ; whorls 5, rapidly increasing, sometimes with revolving 

 lines; aperture large, ends of margin approaching; umbilicus 

 small and deep. 



Diam. 35, height 13 mill. 



Alabama. 



Larger than its allies, lighter in color, more depressed, and of 

 heavy texture. 



