LYMNZID2 OF NORTH AMERICA. 529 
34. Galba gabbii (Tryon). Clear Lake, Cal. (23810). From type lot, 
ex. Tryon. 
35. Galba gabbit (Tryon). San Francisco, Cal. (Coll. Hemphill). 
36. Galba gabbii (Tryon). San Francisco, Cal. (23332). 
Figures 1-13, 18-25, slightly enlarged; figures 14-17, 32-36, enlarged 114 diame- 
ters; figures 27-31, natural size. 
PLATE XLIII. 
Figures 1-3. Galba emarginata (Say). Isle Royale, Lake Superior (23992) 
4-8. Galba emarginata (Say). Mud Lake, Aroostook Co., Maine 
(23670). 
9. Galba emarginata (Say). Mud Lake (Second Eagle Lake), Aroos- 
took Co., Me. Juvenile (23694). 
10-11. Galba emarginata (Say). Square Lake Inlet, Aroostook Co., 
Maine (23993). 
12. Galba emarginata (Say). Square Lake Inlet, Aroostook Co., Maine 
(23700). 
13. Galba emarginata mighelsi (BINNEY). Juvenile. Square Lake Inlet, 
Aroostook Co., Me. (23702). 
14-21. Galba emarginata mighelsi (BINNEY). Square Lake Inlet, Aroos- 
took Co., Me. (23698). 
Figures natural size (9, 13, slightly enlarged). 
PLATE XLIV. 
Figures 1-3. Galba emarginata angulata (Sows.). Houghton Lake, Mich. 
Specimens compared with Sowerby’s type in British Museum 
(23704). 
4-6. Galba emarginata angulata (Sows.). Houghton Lake, Mich. (Coll. 
Walker). 
7-9. Galba emarginata angulata (Sows.). First of Four lakes, Madison, 
Wis. (23707). 
10-18. Galba emarginata wisconsinensis (BAKER). Tomahawk Lake, Wis. 
Types (24504). Showing variation from elongated to depressed 
spire. 
19-23. Galba emarginata canadensis (Sows.). Crooked Lake, Emmet 
Cos, Mich (23742): 
Figures natural size. 
PLATE, XLV. 
Figure 1. Galba emarginata canadensis (Sows.). Immature. Owasco Lake, 
N. Y. (23679). 
2-10. Galba emarginata canadensis (Sows.). Owasco Lake, N. Y. 
Showing extremes of variation (23678). 
11-13. Galba emarginata canadensis (Sows.). Owasco River, N. Y. 
(23682). 
14-15. Galba emarginata canadensis (Sows.). Bear Lake, Mich. (23713). 
16-17. Galba emarginata. canadensis (Sows.). Bear Lake, Mich. (24548). 
18-20. Galba emarginata canadensis (Sows.). Bear Lake, Mich. (23714). 
