6 University of Michigan 



and leaves. Chippewa : From old logs and from a dry pond 

 in spruce and birch woods. The largest shell is very close to 

 anthonyi and ought perhaps to be called that. 



The predominance of this form over the preceding one 

 records with the observations of Walker (Walker, 1908, p. 

 287) wdio states that antJwnyi is "apparently replaced 

 throughout the Upper Peninsula by the var. catskillensls Pils." 



15. Hclicodiscus paraUelus (Say). — Schoolcraft: This 

 common form was found in decaying wood and leaves in the 

 hardwood forest. Alger: Found in old dead logs. 



16. Sliccinca rctusa Lea. — Alger: Three lots of immature 

 shells from Whitefish River have been referred to this species. 

 The largest measures 10 mm. in altitude and 6.75 mm. in 

 aperture length. 



17. Sliccinca ovalis (Say). — Chippewa: Very young speci- 

 mens from Shelldrake River near Vermilion. 



18. Strobilops virgo (Pils.). — Schoolcraft: From leaves 

 in a pond. "A characteristic boreal species * * * apparently 

 rarely found south of the Saginaw-Grand valley." (Walker, 

 T908, p. 282.) 



19. CocJilicopa luhrica (Miill.). — Schoolcraft: Three in- 

 dividuals were found on logs on both high and low ground. 



20. Lvuincra Jiuiiiilis inodicclla (Say). — Schoolcraft: One 

 small shell, not fully mature, was found in a w^ooded swamp. 



21. Lymucca obntssa peninsiilcc Walker. — Schoolcraft: 

 One lot of twenty specimens was taken from submerged logs 

 and sand in Buschwahr Creek. All the specimens are imma- 

 ture, several are somewhat malleated, and almost all have their 

 ?])ices eroded. 



22. Lyiiuuc obntssa cxigua Lea. — Chippewa: Found in a 

 pond on the beach at Vermilion. 



