Frac LAKE, Aue. 27—30, 1915. 
15 COLLECTIONS, DeptH, 3.5 To 5 rt. Lirrte Living VEGETATION 
508 
Bortom FauNA 
Number per square yard 
Pounds per acre 
Vivipara contectoides | 1.0 1.0 5.0 
Leech, small 37.8 6.4 
Chironomid larvae (large spp.) 23.3 69.5 15.4 
Chironomid larvae (small spp.) 8.4 11 
Total | 70.5 27.9 
Seess Lake, Oct. 13, 1914. Borrom Fauna 
7 COLLECTIONS, DepTH, 2.5 To 5 FT. SOME VEGETATION 
5.0 
22.9 
Number per square yard| Pounds per acre 
Vivipara contectoides | 2.8 2.8 14.0 14.0 
Musculium transversum 8.5 4.2 
Pisidium sp. 57.1 Pn 
Valvata spp. 130.0 7.1 
233.0 15.5 
Amnicola limosa 27.5 1.5 
Amnicola emarginata 5.7 0.3 
Physa, small sp. 4.2 0.1 
Leeches (small spp.) 8.5 1.4 
Leeches (large spp.) 18.5 36.0 
Chironomid larvae (large spp.) 48.5 32.5 
Small Oligochaeta 480.0 702.5 16.8 94.5 
Libellulid nymph (small sp.) 4.2 2.1 
Hyalella knickerbockeri’ 142.8 5.7 
Total 938.3 124.0 
