OF NORTH AMERICA. 523. 



23-25. Galba owascoensis (BAKER). Owasco Lake, N. Y. (TYPES, 23137).. 

 26-27. Galba humilis (SAY). Charleston, S. C. (Coll. Walker 12815). 

 28-30. Galba humilis (SAY). Mouth of Woodbury Creek, below Glouces- 

 ter, N. J. (24542). 



31-32. Galba humilis modicella (SAY). Oakland Co., Mich. (23105). 

 33-34. Galba humilis modicella (SAY). Macomb Co., Mich. (23152). 

 35. Galba humilis modicella (SAY). Des Moines, Iowa (23954). 

 36-37. Galba humilis modicella (SAY). Long Lake, Alpena, Mich.. 



(23955). 



Figures 1-4, 26, 27, 31-37, enlarged 2 diameters ; 15-25, 27-30, enlarged 2^ diame-. 

 ters ; 5-14, enlarged 3 diameters. 



PLATE XXX. 



Figures 1-2. Galba umbilicata (C. B. ADAMS). Rhode Island (Coll. Walker).. 

 3-7. Galba umbilicata (C. B. ADAMS). Aroostook Co., Maine (23148).. 

 8. Galba cyclostoma (WALKER). TYPE (Coll. Walker, 13599). 

 9-12. Galba parva (LEA). Des Moines, Iowa (23102). 

 13-15. Galba dalli (BAKER). Lake James, Steuben Co., Ind. (TYPES,. 



23125). 



16. Galba dalli (BAKER). Scalariform. Rockford, Ills. (23123). 

 17-18. Galba dalli (BAKER). Rockford, Ills. (23124). 

 19-20. Galba humilis (SAY). Vacant lot, Charleston, S. C. (23145). 

 21-24. Galba, species. Greenhouse, Boulder, Colo. (24545). 

 25-26. Galba catascopium (SAY). Say's original figures in Amer. Conch.,. 



pi. 55, fig. 2. 

 27-28. Galba emarginata (SAY). Say's original figures in Amer. Conch., 



pi. 55, fig. 1. 



29. Galba peter si (DALL). Alaska Moll., pi. II, fig. 3 (TYPE). 

 30-31. Galba reflexa (SAY). Say's figures, Amer. Conch., IV, pi. 31,. 



fig. 2. 

 32-33. Galba umbrosa (SAY). Say's figures, Amer. Conch., IV, pi. 31, 



fig. 1. 



34. Galba elodes (SAY). Say's figure, Amer. Conch., IV, pi. 31, fig. 3. 

 Figures 1-12, 19-24, enlarged about 2^ diameters; figures 13-18, enlarged 4. 

 diameters; figures 25-28, 30-34, natural diameter; figure 29, slightly enlarged. 



PLATE XXXI. 



Figure 1. Galba jamesii (LEA) =modicella (SAY). TYPE (Smith. Inst.,. 



29106). 



2-3. Galba humilis modicella (SAY). Silver Lake, Ills. (23958). 

 4. Galba humilis modicella (SAY). Montgomery, Ala. (23209). 

 5-7. Galba humilis modicella (SAY). Hamilton Co., Ohio (23212). 



8. Galba humilis modicella (SAY). Pipe Creek, N. Y. Juvenile (23260).. 



9. Galba humilis modicella (SAY). La Porte, Ind. Striped form (23956). 

 10-13. Galba humilis rustica (LEA). Cedar Lake, Montcalm Co., Mich. 



(Coll. Walker). 



14. Galba humilis rustica (LEA). Mohawk, N. Y. (23192). 

 15-19. Galba ferruginea (HALDEMAN). Near Ashford, Pierce. Co., Wash-_ 



ington (24541). 



