110 College of Forestry 
Oneida Lake. As no Pisidia are mentioned in the published 
list which is quite old, it is quite probable that this total 
number of species could be increased by at least a dozen 
species. 
3. TrRaveRSE Bay Recion-LaKkr MIcHIGAN. 
Some years ago the Michigan Fish Commission (Walker, 
1896, pp. 96— ~99), conducted dr edging in the neighborhood of 
Charlevoix, Michigan, both in Lake Michigan and in some 
of the inland lakes, Pine, Bear, etc. Sixty-four species of 
aquatic mollusks were collected of which 23 are represented 
in Oneida Lake. A single haul of the dredge over a bed of 
Chara, near High Island, brought up several hundred speci- 
mens of 26 species belonging to 7 genera, as noted below 
Coes 
LAVINA swap seca P eee diatheatat ae Bae ee Ariel eo wore 5 species. 
IPI@MOLDIB: Fics bocce ks nich SO eee a cee ne eee 3 a 
1270 h(S5 ene eae ek Rene acum ya RC Ae Fee ante atevees ] 5 
ATMMIGOla (1545.0: bi vtec pelea ee a PRE ARE 3 y, 
ByGhine lila); cus. he dk: Reps a hese Phe eueroy es chose ne ea 1 re 
[PAESICoU I Nani Gey es hye Ree Granta nhs Arietta tears S ord Bic 1] a 
Several of these genera (Lymnaea, Planorbis, Valvata, 
Amnicola, Spherium and Pisidium) were found living at a 
depth of 25 meters or about 81 feet. The largest number of 
species, however, was found where there was an abundance of 
vegetation as was observed in Oneida Lake. 
4, Saarnaw Bay Reaion, Micuigan (Lake Huron). 
Saginaw Bay (H. B. Baker, 1911, pp. 121-176) has many 
features in common with Oneida Lake, although it does not 
belong to the same class of water bodies, being an open bay 
of a large lake. Here, however, there are rocky, wave beaten 
shores, sandy exposed shores, protected bays and sandy pools. 
and the fauna varies in accordance with the habitat. It is 
noteworthy that the exposed, rocky shores are inhabitated by 
mollusks with a wide foot, such as Physa ancillaria magna- 
lacustris, Lymnea emarginata ontariensis, and (roniobasis 
livescens; these are paralleled in Oneida Lake by Lymnea 
