36 University of Michigan 



Lynmcra kirtlandiana Lea var. Habitat i8. Shells more 

 elongated and attenuated than preceding (Table VII), with 

 even less convex whorls. Aperture narrower and outside edge 

 approached body whorl at a more acute angle. Finely striated, 

 satin-like in luster; mostly distinctly and regularly but not 

 strongly malleated. Color light-straw, darker toward apex; 

 first whorl dark wine-color; callus white with a slight tinge 

 of reddish purple and a chestnut stripe along inner side. 



Measurements shown above (Table VII, Nos. 5-7). The 

 largest shell and another of similar size were slightly scaliform. 



Lymncsa obrussa peninsulcu Walker. Habitats: 3, 13, 14, 

 16, 19, 22, 26, 27m, 28, 47, 49. In swampy places. 



Lymncea obrussa decampi (Streng). Habitats: 6m, 7m, 27m. 

 Not found living. 



Lymncea humilis Say? Habitat 3. Four juvenile specimens. 



Lymncoa humilis modicella Say. Habitats: 8, 11. Only 

 found in lakes. 



Ancylid^ 



Ferrissia parallcla (Haldeman). Habitats: 2, 5, 8, 35. On 

 logs and vegetation in lakes ; rocks in rivers. Most of the 

 specimens were rounded rectangular, but those from Sand 

 Portage (35) were flattened and more nearly oval, perhaps 

 on account of the swift current. 



PUPILUD.E 



Vertigo gouldii (Binney). Habitats: 41, 42. Quite com- 

 mon in the bog (42). 



Vertigo ventricosa elatior Sterki. Habitat 47, creek flats. 



Vertigo tridcntata Wolf. Habitat 41; a single specimen. 



Vertigo sp. ? Habitat 44; too young to be identified. 



BiHdaria contracta (Say). Habitats: 36, 39, 40, 41, 48. 

 One of the more common shells of the hardwoods. 



