OF NORTH AMERICA. 521 



PLATE XXVI. 



Figures 1-2. Acella haldemani ( (DESK.) BINNEY). Grand Rapids, Mich. 



(23909). 



3-4. Acella haldemani ( (DESK) BINNEY). Reed's Lake, Mich. (23910). 

 5-7. Galba bulimoides cockerelli (PILSBRY and FERRISS). Chaco Canyon, 



New Mexico. (23227). 



8-10. Galba obrussa (SAY). Monocacy Creek, Bethlehem, Pa. (24633). 

 11-13. Galba obrussa (SAY). Lebanon, Pa. (24630). 

 14-16. Galba petoskeyensis (WALKER). Petoskey, Mich. (COTYPES, 



23316). 



17-20. Galba palustris (MULLER). Sugar Island, Alpena, Mich. (23424). 

 21-26. Galba palustris (MULLER). Halma, Minn. (23381). Figures 17-26 



are excellent examples of spire variation. 



27-28. Galba palustris (MULLER). Fort Erie, N. Y. (23421). 

 29-32. Galba palustris (MULLER). Braddock's Bay, near Charlotte, N. Y. 



(23415). 



33-34. Galba palustris (MULLER). Ebenezer, N. Y. (23412). 

 35-37. Galba palustris (MULLER). Windsor, Colo. (23451). 

 Figures 1-4, 8-13, enlarged 1J^ diameters; 5-7, enlarged 2 diameters; other figures 



about natural size. 



PLATE XXVII. 



Figures 1-2. Galba truncatula (MULLER). Roundhay, Leeds, England. (Phila. 



Acad., 58939). 

 3-4. Galba truncatula (MULLER). Park Lane, Burnley, England. (Phila. 



Acad., 66691). 



5-8. Galba doddsi BAKER. Hot Sulphur Springs, Colo. (TYPES 23937). 

 9-10. Galba cubensis (PFR.). Havana, Cuba (23318). 



11. Galba cubensis (PFR.). Havana, Cuba (23319). 



12. Galba cubensis (PFR.). Valles, Mexico (23320). 



13-15. Galba cubensis (PFR.). Pujal Lake, Valles, Mexico (24634). 



16. Galba cubensis (PFR.). Valles, Mexico (23886). 



17-19. Galba cubensis aspirans (PILSBRY). Barbadoes (23224). 



20. Galba bryanti BAKER, (^bulimoides, juv.). Alameda, Cal. (TYPE, 



coll. Walker, 1352). 

 21-24. Galba bulimoides (LEA). Menton Ranch, Santa Clara Co., Cal. 



(24536). 



25. Galba bulimoides (LEA). Oregon (TYPE, Smith coll., 118647). 

 26-28. Galba bulimoides (LEA). San Luis Obispo Co., Cal. (Coll. 



Walker, 3760). 



29. Galba bulimoides (LEA). Pajaro Valley, Cal. (24567). (=adelincs 



TRYON.) 



30. Galba bulimoides techella (HALD.). Bixby, Cal. (24509). 



31. Galba bulimoides techella (HALD.). Bardsdale, Ventura Co., Cal. 



(23946). 



32. Galba bulimoides techella (HALD.). Rockwell Co., Texas (23323). 

 33-35. Galba bulimoides techella (HALD.). Bardsdale, Cal. (23942). 



All figures enlarged about two diameters. 



