OF NORTH AMERICA. 527 



19. Galba proximo, rowellii (TRYON). San Francisco, Cal. (23647). 

 20-21. Galba proxima rowellii (TRYON). San Francisco, Cal. (23648). 

 Figures 1-3, 13, enlarged 1^2 diameters; 4-12, 14-21, about natural size. 



PLATE XXXIX. 



Figure 1. Galba leai (BAKER). San Francisco, Cal. (TYPE, 23653). 

 2-3. Galba leai (BAKER). San Francisco, Cal. (Coll. Nason). 



4. Galba tryonii (LEA). COTYPE. San Antonio, Cal. One of the type 



specimens. (Smith. Inst, 121470). 



5. Galba tryonii (LEA). Vancouver Island (23654). 



6. Galba traskii (TRYON). San Francisco, Cal. Original locality. (Coll. 



Hemphill). 

 7-8. Galba traskii (TRYON). Black Rock Butte, Wyoming (Coll. 



Walker, 13506). 



9-10. Galbi traskii (TRYON). Banff, Alberta (24631). 

 11-16. Galba vahlii ("BECK" MOLLER). Near St. Michaels, Alaska 



(23656). 

 17-18. Galba vahlii ("BECK" MOLLER). Mud Lake, Yukon Territory 



(23657). 



19. Galba vahlii arctica (LEA). Hudson Bay (Walker coll.). 

 20-23. Galba vahlii arctica (LEA). Moose River, Hudson Bay. Part of 



original lot. (23660). 

 24-27. Galba vahlii pingellii ("BECK" MOLLER). Near St. Michaels, 



Alaska (23658). 



28. Galba neopalustris BAKER. Orange, Va. (TYPE, 23547). 

 Figures 1-3, natural size; figures 4-10, enlarged 2 diameters; figures 11-28, 



enlarged 1J/2 diameters. 



PLATE XL. 



Figures 1-5. Galba pallida (ADAMS). Shoreham, Lake Champlain, Original 



locality. (Coll. Bos. Soc. N. H.). 



6-10. Galba catascopium (SAY). Erie Canal, Rochester, N. Y. (23733). 

 11-12. Galba cotascopium (SAY). Lower Genesee River, Rochester, N. 



Y. (23732). 

 13-15. Galba catascopium (SAY). Between Upper and Middle Falls, 



Rochester, N. Y. (23731). 



16. Galba catascopium (SAY). Third Point, Pine Lake, Mich. (23761). 

 17-19. Galba catascopium (SAY). Oyster Bay, Pine Lake, Mich. (23760). 

 20-22. Galba catascopium (SAY). Raspberry Bay, Pine Lake, Mich. 



(23762). 

 23-26. Galba catascopium (SAY). St. Lawrence River, below mouth of 



Montmorency. =.pinguis SAY. (Canadian Geol. Surv.) 

 27-28. Galba pinguis (SAY), ^catascopium (SAY). Mohawk River, N. 



Y. (23775). 

 29-30. Galba pinguis (SAY), ^catascopium (SAY). Seneca Lake, N. Y. 



(23779). 



31. Galba intcrtexta (CURRIER). =catascopium (SAY). COTYPE, imma- 

 ture. (Walker coll., 17358). 



