Juday—Quantitative Studies of Fauna in Lake Mendota. 491 
Table 15. Summary of the live weight and of the dry weight of the 
various forms found at the five stations in deep water and at station I. 
The weights for the deep water area are based on the averages for- the 
five stations. The live weight of Pisidium was not determined, so that it 
is not included in the totals under live weight. 
Deep-water Stations 
Live Weight 
Dry Weight 
Kilograms 
per 
Hectare 
Pounds 
per 
Acre 
Kilograms 
per 
Hectare 
Pounds 
per 
Acre 
Oligochaeta . 
57.8 
51.4 
10.9 
9.7 
Pisidium . 
4.7 
4.1 
Chironomus .. 
75.4 
67.3 
12.1 
10.8 
Corethra .. 
558.0 
497.0 
47.9 
42.7 
Protenthes . 
5.6 
5.0 
1.0 
0.8 
Total . 
696.8 
620.7 
76.6 
68.1 
Station I 
Oligochaeta . 
38.3 
34.1 
7.2 
6.4 
Pisidium . 
4.4 
3.9 
Chironomus . 
102.3 
91.1 
16.6 
14.8 
Corethra . 
288.0 
256.5 
24.7 
22.0 
Protenthes . 
5.3 
4.7 
0.9 
0.8 
Total ...J 
433.9 
386.4 
53.8 
47.9 
