[34 ] 



Diam. generally 12 to 15 mill. 



Alaine to Iowa, southwards to Georgia and Mississippi. 



Lighter in color, and much smoother than sportella, 



5. Macrocyclis Voyana, Newcomb. 



Plate 3, figure 9. 



Small, depressed ; whorls 5, convex, the last declining to- 

 wards the aperture and somewhat flattened or concave above, 

 striate ; aperture sinuate above, the lip slightly expanded, its 

 extremities joined by a callus on the body-whorl ; below 

 broadly umbilicate. Pale horn-color, 



Diam. 12'5 mill. 



Canyon Creek, Trinity Co., California. 



Smaller, darker colored and of more rugged aspect than the 

 other Californian species ; it may also be distinguished by the 

 much greater sinuosity of the upper part of the lip. 



6. Macrocyclis Elliotti, Redfield. 



Plate 3, figure 10. 



Whorls 5, depressed, conic or slanting above, suture mode- 

 rate, striate, polished, well rounded beneath ; umbilicus nar- 

 row, deep, aperture very oblique, wide ; light greenish-yellow. 



Diam. 8, height 4 milL 



North Carolina to Georgia. 



HYALINA, Ferussac. 

 1. Axis deeply indented at hose but not perforate. 



1. Hyalina indentata, Say. 



Plate 8, figure 11. 



Whorls 4, flattened, thin, pellucid, polished, corneous, rapid- 

 ly enlarging; aperture rather large, transverse, the peristome 

 reaching below to the cetitre of the base of the shell, which is 

 well impresed, but imperforate. 



Diameter 5 mill. 



From Canada to Florida, and westward to Michigan and 

 Texas. 



