206 Wisconsin Academy of Sciences , Arts, and Letters. 
Station TV. (Figure 5.) 
Substation 1. 
South shore of Tomahawk Lake near Quynock Point, oppo¬ 
site Sanders’ Resort. A small embayment affords a typical hab¬ 
itat for several mollusks. The bottom is of firm sand; the 
water near the shore is from ten to twenty inches in depth, rap¬ 
idly deepening to ten, fifteen, twenty or more feet toward the 
lake. Lymncea emarginata wisconsinensis is plentifully scat¬ 
tered over the sandy bottom, Lymncea stagnalis lillianw and 
Planorbis binneyi are abundant on the sandy bottom and on 
floating logs, and several species of naiads live in five to ten feet 
of water. Evidences of the muskrats’ presence were seen in the 
shape of little piles of dead shells along the shore. 
MOLLUSCA COLLECTED. 
In Deep Water. 
Lampsilis luteola. 
Anodonta grandis footiana. 
Anodonta marginata. 
In Shallow Water. 
Lymncea stagn'alis lilliance. 
Lymrtwa emarginata wisconsinensis. 
Planorbis binneyi. 
Planorbis campanulatus. 
Planorbis campanulatus rudentis. 
Physa ancillaria warreniana. 
Substation 2. 
The shore of Substation 1 is swampy with a heavy growth of 
Typha latifolia and back of this plant society the ground rises 
and is heavily wooded with a coniferous forest. Planorbis and 
Lymnwa occur in fair number in this habitat, which is in great 
contrast with that of Substation 1. 
