LYMNZIDZ OF NORTH AMERICA. 429 
Length. Width. Aperture length. Width. 
37.00 15.50 17.50 7.75 mill. (coll. Walke1.) 
23.50 11.00 12.50 6.505 0 a Bear Lake, Mich. 
24.00 13.50 13.00 8:00) -e Crooked Lake, Mich. 
26.00 ist50 15.00 8:50). Zz = xe 
24.00 11.75 11.50 Gio 0s ie ‘ . 
20.00 Ua lair’ 11.60 700". 7 s . < 
19.50 11.50 11.00 6:00: ~~ x ss - 
26.75 16.00 15.00 TOON New York. 
23.00 15.50 14.00 TOON = a 
19.75 10.50 11.00 AOD) 
21.00 11.00 11.00 7.008 
18.50 11.50 11.50 S00. 
16.00 10.00 10.75 OOM ts 
15.00 10.00 10.50 Hm ay 
12.25 9.00 8.50 7200 oy 
Types: British Museum, London, England. 
Type Locarity: Unknown; probably in Canada. 
ANIMAL, JAw, RapuLa and GENITALIA: Unknown. 
Rance: (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).’ 
MicuicaAN: 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). 
_1No specimens of emarginata or its varieties have been seen from Con- 
necticut. This record needs confirmation. 
