Banker—Molluscan Fauna of Tomahawk Lake, Wisconsin. 205 
Station III. (Figure 4.) 
Exposed north shore of Tomahawk Lake, near Sanders’ Re¬ 
sort. The bottom is sandy and gradually deepens to ten or fif¬ 
teen feet when it becomes very deep, at one place being reported 
as dropping suddenly to a depth of sixty feet. It is very shal¬ 
low for a distance of fifteen or twenty feet, and especially so on 
a long point extending southeasterly into the lake for a distance 
of some thirty feet the water being scarcely a foot deep on the 
bar but falling suddenly to sixty feet just off the end of the 
point. 
The sandy shore, thought in a most exposed situation, and 
subject to heavy surf action during northwesterly storms forms 
a well tenanted habitat for Lymncea emarginata, Campeloma de- 
cisum, Planorbis bicarinatus striatus and Physa ancillaria war - 
reniama. In the deep water many naiads abound. During 
heavy wind or storms the water is thrown over the ridge of sand 
forming the beach and collects in little pools which are inhab¬ 
ited by Lymncea and Physa, with an occasional Campeloma 
washed in by the waves. These small pools were also good 
habitats for the Leopard Frog (Rama pipiens). 
MOLLUSCA COLLECTED. 
In Deep Water. 
Anodonta grandis footiana. 
Anodonta marginaia. 
Lampsilis luteola. 
In Shallow Water. 
Sphcerium simile. 
Amnicola cincinnatiensis. 
Campeloma decisum. 
Physa ancillaria warreniana. 
Planorbis bicarinatus striatus. 
Planorbis campamdatus. 
Planorbis campanulatus ruderitis. 
Lymncea emarginata wisconsinensis. 
Of the above, Amnicola was represented only by dead shells, 
washed from some other habitat. 
