LYMNAIDA OF NORTH AMERICA. 349 
Type Locarity: Poland, Ohio. 
ANIMAL, JAW, RADULA and GENITALIA: Not examined. 
RANGE: (Figure 40) Ohio west to South Dakota, northern Michi- 
gan south to northern Illinois. 
Kirtlandiana occupies a large part of the humid division of the 
Transition and Upper Austral life zones, extending northward into the 
Boreal (Canadian) life zone (in Michigan). Kirtlandiana appears to 
be of more northern distribution than e.rilis. It is confined to the 
Canadian and Upper Mississippian regions. 
RECORDS. 
Ituinois: Mud Lake, Grand Crossing, Chicago, Cook Co. (Baker); Berry 
Lake, Cook Co. (Higley); Crystal Lake, McHenry Co. (Nason). 
Micuican: St. Mary’s River, Chippewa Co. (Walker). 





Onto: Portage Co. (Dean); Garrettsville, Portage Co. (Hinkley; 
Walker) ; Poland, Mahoning Co. (Kirtland; Lea; Walker); pond, Stone Creek, 
near New Philadelphia, Ohio, Tuscarawas Co. (Sterki). 
SoutH Dakota: Big Sioux River (Lea). 
GEOLOGICAL RANGE: Unknown. 
Eco.tocy: Kirtlandiana is characteristic of small bodies of water, 
especially those that may become dry in the summer. 
REMARKS: Kirtlandiana is related to several species, but appears 
tc be recognizable. The whorls are not as flat-sided nor as oblique 
as are those of e-vilis, nor has the aperture the distinct twist; it is also 
slightly perforate while exilis is not. It may be known from lanceata 
by its much narrower, more clongate shell, more turrcted whorls, and 
