29-4 THE CHICAGO ACADEMY OF SCIENCES. 



history is complete. It now inhabits the Xova Seotian, Canadian. 

 Hudsonian, Californian and Columbian regions. 



RECORDS. 



UNITED STATES. 



California: Pacific Grove, Monterey Co. (Berry); near Monterey, 

 Monterey Co. (Dall). 



Michigan: Alpena, Alpena Co. (Xason) ; Crooked Lake, Emmet Co.; 

 Pine Lake, eight metres, Charlevoix, Charlevoix Co. (Walker) ; Emmet, Grand 

 Traverse, Alpena, Macomb and Oakland Counties ; generally distributed over the 

 state (Walker). 



New York : Braddock's Bay, near Manitau, Monroe Co., Lake Ontario 

 (Baker) ; Squaw Island, near Buffalo, Erie Co. (Miss Walker). 



Washington: Columbia River, Vancouver, Clarke Co. (Dall). 



BRITISH AMERICA. 



Keewatin : Attawapiskat River (Dall) ; Kawinogans Lake and Kanuchuan 

 River, Attawapiskat River; OzhiskrLake; Wapicopa Lake, Winisk River (Whit- 

 eaves). 



Ontario: Ottawa, Carleton Dist. (Billings, Lea Coll.); Fort Francis, 

 Winnipeg River, Rainy River Dist. (Latchford). 



Saskatchewan : Grand Rapids of Saskatchewan River, near Lake Winni- 

 peg (Dall). 



Geological Distribution : Pleistocene. 



RECORDS. 

 United States 



marl DEPOSI" 1 



Indiana : Three-fourths mile southwest of Stewartsville, Posey Co. ; one 

 and one-half miles northwest of Petersburg, Pike Co. (Smith. Inst.). 



Michigan: Kegomic, Emmet Co. (Slocum). 



Minnesota: Fergus Falls, Otter-tail Co. ( E. P. Berkey). 



New Jersey: White Pond, Sussex Co. (Pilsbry and Rhoads; Weller) ; 

 near Franklin, Sussex Co. (Say). 



New York: Herkimer Co., in calcareous tufa (Lewis). 



Alaska. 



Alaska: Left bank of Yukon River, below old Fort Yukon (Dall). 

 British America. 



Xew Brunswick: Sawler's Lake, St. John, St. John Dist. (Dall). 



Ontario : Hemlock Lake, New Edinburg, east of Ottawa, in soft white 

 calcareous-argillaceous matrix (Ami) ; Ottawa, Carleton Dist. (Dall) ; Eagle's 

 Xest Lake, Lower Canada (D'Urban; Whiteaves). 



Quebec: Anticosti Island (Dall; Schmidt). 



Ecology: Galbana prefers a habitat where the water is clear 

 and in more or less movement. 



Remarks : Galbana is very little understood among conchologists, 

 probably on account of its being first described as a fossil. Is is very 

 common in many localities, has a wide range and is remarkably uni- 

 form. It has been mistaken for both Galba humilis and Galba luimilis 

 modicclla, but it is a much more solid shell. ''It is a more robust shell 



