32. VERTIGO OVATA (Say). 
Generally distributed over the lower peninsula. Also on. 
Lime Island in the St. Mary’s River, Chippewa county. The 
most common species of the genus. ‘‘ Plenty in some localt- 
ties in Kent county,” Streng. 
Ta 
33. VERTIGO MORSE! Sterki. 
The types of this species were discovered by Dr. DeCamp 
at Dewey’s Mill, Kent county, and were listed by him as Pupa 
decora (Gld.) It has not, as yet, been found elsewhere in the 
state. 
34. VERTIGO VENTRICOSA (Mse.) 
Grand Rapids, where it has been found by DeCamp and 
Streng, is the only known locality. ‘‘Rare in Kent county,” 
Streng. i 
34a. VERTIGO VENTRICOSA ELATIOR Sterkt. 
The two known localities, East Saginaw and Charlevoix 
indicate a range across the northern part of the state. 
35. VERTIGO GOULDII Binn. 
The returns indicate a general distribution over the state, 
but it is apparently not as common a species as ova/a, though 
usually abundant where found. 
36. VERTIGO BOLLESIANA (Mse.) 
Charlevoix is the only locality reported. 
37. VERTIGO TRIDENTATA Wolf. 
A single specimen from Ann Arbor is the only one 
known from this state. 
38. COCHLICOPA LUBRICA (Miill). 
This species, more commonly known as /erussacia subcy- 
/indrica (U.), is very generally distributed in both peninsulas. 
39. CIRCINARIA CONCAVA (Say). 
Of general distribution south of the Saginaw-Grand val- 
ley. North of that it has only been reported from Lime 
Island in the St. Mary's river. ‘‘ Not very abundant in Kent 
county,” Streng. 
40. OMPHALINA FULIGINOSA (Griff.) 
Apparently rare and local. Reported from Ottawa, Kent, 
Genessee and Washtenaw and Monroe counties, which indi- 
cate a range across the southern part of the state. ‘‘ Very 
rare in Kent county,” Streng. 
18 
