fr.'.' THE CHICAGO ACADEMY OF SCIENCES. 



PLATE XXVIII. 



Figures 1-2. Galba bulimoides techclla (Haldeman). Baird's Lake, Ventura 

 Co., Cal. (23947). 



3. Galba bulimoides techclla (Haldeman). Near San Diego, Cal. (Coll. 



Hemphill). 



4. Galba bulimoides cockerelli (Pilsbry & Ferriss). Ogalalla, Neb. 



(23225). 



5. Galba bulimoides cockerelli (Pilsbry & Ferriss). Chaco Canyon, 



New Mexico (23328). 

 6-7. Galba bulimoides cockerelli (P. & F.). Bardsdale, Ventura Co., Cal. 



(23945). 

 8. Galba bulimoides techella (Haldeman). Albuquerque, N. Mex. 



(23222). 

 9-11. Galba bulimoides cassi Baker. Rose Canyon, near Pacific Grove, 



Cal. (Types, 23948). 

 12. Galba sonomcensis (Hemphill). Sonoma Co., Cal. (23229). 

 13-14. Galba sonomcensis (Hemphill). Sonoma Co., Cal. (Cotypes, coll. 



Hemphill). 

 15-18. Galba hendersoni (Baker). East of Fort Collins, Colo. (Types, 



24537). 

 19. Galba perpolita (Dall). Nushagak, Bristol Bay, Alaska. Alaska 



Moll, pi. 2, fig. 8. Type. 

 20-22. Galba caperata (Say). Des Moines, Iowa (23863). 

 23-24. Galba caperata (Say). White Rock, Colo. (23864). 

 25. Galba caperata (Say). North Platte City, Neb. (23865). 

 26-27. Galba caperata (Say). Emerson, Manitoba (23866). 

 28-29. Galba caperata (Say). Calumet Lake, Ills. (23869). 



30. Galba caperata (Say). Liverpool, Ind. (23870). 



31. Galba caperata (Say). Boulder, Colo. (23873). 



32. Galba caperata (Say). Near Salt Lake, Utah (Coll. Hemphill). 



33. Galba caperata (Say). Near Salt Lake, Utah. Scalar specimen. 

 Figures 12-14, enlarged about 3 diameters; 19, l J / 2 diameters; balance enlarged 



2 diameters. 



PLATE XXIX. 



Figures 1-2. Galba caperata (Say). Mud Lake, Yukon Terr. (24704). 



3. Galba ferrissi (Baker) =caperata Say. Joliet, Ills. (Type, 3458). 



4. Galba holbollii ('Beck' Moller). Greenland (Coll. Walker). 

 5-7. Galba parva (Lea). Des Moines, Iowa (23136). 



8-9. Galba parva (Lea). Des Moines, Iowa (23109). 

 10-11. Galba parva (Lea). Algonquin, Ills. (23141). 



12. Galba parva (Lea). Canton, Ills. (23106). 



13. Galba parva (Lea) . Dyer, Ind. (23150). 



14. Galba parva (Lea). Pittsburgh, Pa. (23107). 



15. Galba parva sterkii (Baker). Near Cleveland, Ohio (Type, 23156). 

 16-17. Galba parva sterkii (Baker). Canton, Ills. (23158). 



18. Galba parva sterkii (Baker). Fox River, Ills. (23142). 

 19-20. Galba parva sterkii (Baker). Goshen, Ohio (23163). 

 21-22. Galba parva sterkii (Baker). Blickston, Ohio (23162). 



