Crpar Lake, Aucust—OctToseEr, 1916. 
516 
Borrom FAuNA 
24 CoLLecTions, LirroraL ZoNE, 1 To 7 Fr. SOME VEGETATION 
Number per square yard 
Pounds per acre 
Sphaerium striatinum 4.4 3.0 
Musculium transversum 11.0 5.5 
Pisidium spp. 24.2 0.9 
Amnicolidae 37.4 2.0 ‘ 
121.0 24.2 
Valvatidae 22.0 1.2 
Physa spp. 11.0 2.5 
Planorbis 6.6 0.3 ° 
Unionidae, young 4.4 8.8 
Oligochaeta (small spp.) 4.4 0.1 
Chironomid larvae (small spp.) 46.2 e“ 
Palpomyia larvae 1.1 On 
Polycentropus larvae trace 
Sand-case caddis larvae 26.4 5.2 
Caddis larvae (on Chara) 41.8 41 
Misc. caddis larvae 19.8 1.9 
430.1 135.6 
Hexagenia, etc. (nymphs) 85.8 17.2 g 
Agrionid nymphs 17.6 8.8 
Libellulid nymphs 15.4 16.5 
Gomphid nymphs 2.2 TA 
Beetles, small 11.0 0.7 
Hyalella knickerbockeri 143.0 5.7 
Asellus sp. 15.4 1.5 
Total 551.1 159.8 
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