Baker—Molluscan Fauna of Tomahawk Lake , Wisconsin. 219 
COMPARISON OP THE FRESH-WATER MOLLUSCAN 
LIFE OF THE DIFFERENT STATIONS. 
(See Table.) 
The twenty-three stations and twelve substations previously 
considered contain a variety of molluscan life. Upon analyz¬ 
ing this life, a division is at once apparent, based on the kind of 
habitat. This analysis is tabulated below. 
Species living on sandy shore subject more or less to rough 
water. 
Lampsilis luteola. 
Anodonta marginata. 
Anckdonta grandis footiana. 
Sphcerium simile . 
Campeloma decimm. 
Physa ancillaria warreniana. 
Planorbis campanulatus. 
Planorbis campanulatus rudentis. 
Planorbis bicarinatus striatus. 
Planorbis binneyi. 
Lymnoea stagnalis lilliance. 
Lymnoea stagnalis wisconsinensis. 
Species living in enclosed or sheltered bays which are con¬ 
nected with the open lake and in which the water never becomes 
stagnant. 
Anodonta grandis footiana. 
Anodonta marginata. 
Physa ancillaria warreniana. 
Planorbis campanulatus. 
Planorbis campanulatus rudentis. 
Planorbis bicarinatus striatus. 
Planorbis binneyi. 
Lymnoea stagnalis lUliance. 
Lymnoea lanceata. 
