479 
9 CoLLEcTIONS, 1- To 3-FT. ZONE, JULY 26 AND 27, 1915 
CHILLICOTHE TO Opposite MossvILLE 
Lioplax subcarinatus 
Vivipara contectoides 
Somatogyrus sp. 
Amnicola emarginata 
Valvata spp. 
Physa sp. 
Planorbis trivolvis 
Musculium transversum ~ 
Pisidium sp. 
_ Oligochaeta (small spp.) 
Leeches (small spp.) 
Asellus sp. 
Chironomid larvae (small) 
Agrionid nymph 
Coleopterous larvae 
Hyalella knickerbockeri 
Total 
Number per square yard 
Pounds per acre 
2.2 2.6 
Mak 30.1 
5.5 27.5 
5.5 2.7 
1.1 trace 
tet 0.4 
148.6 61.2 
8.8 2.0 
2.2 1.5 
53.3 26.6 
70.0 28.0 
16.6 0.5 
27.7 4.7 
6.6 0.6 
76.3 7.9 
7.7 1.0 
15.5 0.6 
1.1 0.5 
1.1 trace 
232.6 99.2 
