15.50 



17.50 



11.00 



12.50 



13.50 



13.00 



13.50 



15.00 



11.75 



11.50 



11.75 



11.60 



11.50 



11.00 



16.00 



15.00 



15.50 



14.00 



10.50 



11.00 



11.00 



11.00 



11.50 



11.50 



10.00 



10.75 



10.00 



10.50 



9.00 



8.50 



6.50 " 



Bear Lake, Mich. 



8.00 " 



Crooked Lake, Mich. 



8.50 " 



" " " 



6.50 " 



" " " 



7.00 " 



" " " 



6.00 " 



" " " 



9.00 " 



New York. 



10.50 " 



" 



7.00 " 



" 



7.00 " 



" 



8.00 " 



" 



7.00 " 



" 



7.25 " 



" 



7.00 " 



a 



LYMN^ID^ OF NORTH AMERICA. 429 



Length. Width. Aperture length. Width. 



37.00 15.50 17.50 7.75 mill. (coll. Walkei.) 



23.50 

 24.00 

 26.00 

 24.00 

 20.00 

 19.50 

 26.75 ' 

 23.00 

 19.75 

 21.00 

 18.50 

 16.00 

 15.00 

 12.25 



Types : British Museum, London, England. 

 Type Locality : Unknown ; probably in Canada. 

 Animal, Jaw, Radula and Genitalia: Unknown. 



Range: (Figure 48). Anticosti Island west to Eastern Wis- 

 consin, south to Southern Michigan, Northern Pennsylvania and 

 Southern New York. A race primarily of the Alleghanian division 

 of the Transition life zone but extending southward into the Upper 

 Austral (Carolinian) life zone and northward into the Boreal (Canad- 

 ian) life zone. It is typical of the Great Lakes (the Canadian region) 

 and of the streams draining into them and but few authentic specimens 

 have been seen from outside this drainage area. 



RECORDS. 

 United States. 



Connecticut: Connecticut (Linsley). 1 



Michigan: Squaw Island, Alpena, Alpena Co. (Baker; Nason) ; Port 

 Austin, Huron Co. (C. A. Davis) ; Crooked Lake, Emmet Co. (Ferriss; Slocum; 

 Walker) ; Bear Lake, Charlevoix Co. (Ferriss) ; Lake Huron (Lathrop) ; south 

 end, east arm, Grand Traverse Bay, Grand Traverse Co., on land spit (Mather) ; 

 Grand Lake, Presque Isle Co. (S. L. Schrum; Walker); River Rouge, Detroit, 

 Wayne Co.; Lake Michigan shore, Charlevoix Co. (Walker); Sault St. Marie, 

 Chippewa Co. (Walker; Walton). 



New York: Cross Lake, Onondaga Co. (Beauchamp) ; Oswego, Oswego 

 Co. (Beauchamp; Marshall) ; Mohawk River (DeKay) ; Cazenovia, Madison Co. 

 (Henderson) ; Owasco Lake (Lewis) ; Hayden's Mills; Owasco Lake and Owasco 

 River, Cayuga Co. (Lyon) ; Lakewood, Chautauqua Lake, Chautauqua Co. 

 (Maury) ; Skaneateles Lake, Onondaga Co. (Smith. Inst.) ; Moravia, Cayuga 

 Co. (Geo. Scarborough); Owasco Lake (Miss Walker). 



Wisconsin: Green Bay (Marston) ; Kenosha, Kenosha Co. (Wiswall). 



1 No specimens of emarginata or its varieties have been seen from Con- 

 necticut. This record needs confirmation. 



