509° 
Sreess LAKE, Sept. 4, 1915. Borrom FAuNA 
8 CoLLEcTIONS, DepTH, 2 To 5.5 Fr. LirTLE VEGETATION . 
Number per square yard 
Pounds per acre 
Vivipara contectoides 3.7 3.7 18.5 18.5 
Valvata spp. 34.0 34.0 1.8 1.8 
J.eeches (small spp.) 24.2 41 
26.5 5.6 
Chironomid larvae (large spp.) 2.3 1.5 
Total 64.2 25.9 
Stewart LAKE, Sept. 7, 1915. Botrom Faun 
12 Cottections, DeprH, 2 To 5.5 FT. ALL IN VEGETATION 
A 
. 
Pisidium sp. 
Valvata spp. 
Young unionid 
Leeches, small 
Number per square yard) Pounds per acre 
Campeloma subsolidum 8.7 26.1 
Lioplax subcarinatus 12.0 20.8 14.4 41.0 
Vivipara contectoides 0.1 : 0.5 
Musculium transversum 21.0 10.5 
Musculium jayanum 3.5 1.9 
7.8 69.8 0.3 . 24.4 
32.5 1a 
5.0 10.0 
Small Oligochaeta 2.5 0.1 
36.0 6.1 
Chironomid larvae (large spp.) 1.6 1.0 
/ 54.0 8.4 
Chironomid larvae (small spp.) 6.6 0.9 
Palpomyia larvae 4.0 0.2 
Hyalella knickerbockeri 3.3 0.1 
144.6 73.8 
Total 
