4, Very SHALLOW, VERY WEEDY Type (Duck, DENNIS, CRANE) 
510 
Duck—DEnnis LAKE, Oct. 2, 1914. Borrom Fauna 
5 CoLLecTIoNns, DreptH, 2.5 To 4 rr. ALL IN VEGETATION 
Number per square yard 
Pounds per acre 
Valvata spp. 188.0 10.3 
Physa, small sp. 6.0 1.3 
Amnicola limosa 8.0 216 0.4 12.4 
A. emarginata 12.0 0.4 , 
Pisidium sp. 2.0 trace 
Small leeches 2.0 0.3 
Small Oligochaeta 12.0 0.4 
Chironomid larvae (large spp.) 106.0 71.0 
Chironomid larvae (small spp.) 72.0 10.0 
276 97.9 
Agrionid nymph 6.0 3.0 
Libellulid nymph 4.0 10.0 
Corixa, small sp. 12.0 0.8 
Hyalella knickerbockeri 62.0 2.4 
Total 492 110.3 
CRANE LAKE, Sept. 7, 1915. 
5 CoLiections, DeprH, 1 To 3.5 FT. 
Bottom FAUNA 
Somr VEGETATION 
Number per square yard 
Pounds per acre 
Campeloma subsolidum 14.0 14.0 42.0 42.0 
: 
Museculium transversum 28.0 14.0 ; 
34.0 14.3, 
Valvata spp. 6.0 0.3 
Chironomid larvae (small spp.) 6.0 0.8 ; 
Leeches (small spp.) 26.0 4.4 
Chironomid larvae (large spp.) 4.0 2.6 
78.0 22.7 
Palpomyia larvae 16.0 das 
Hexagenia, ete. (nymphs) 14.0 12.6 
Caddis larvae _ 12.0 1.2 
Total 126.0 79.0 
