, 408 
Borrom FAaunsA, CHANNEL, LAGRANGE TO GRAFTON, 1915 
POUNDS PER ACRE 
ae ; Small 
Viviparidae Insects, 
and eae tye worms, Total 
Pleuroceridae Sphaeriidae Crustacea 
Lagrange dam to Florence 
4 coll.’s ete trace 
Florence to Kampsville 
5 coll.’s 5.0 1.5 5.9 12.4 
Kampsville to Grafton 
7 coll.’s 5 2.6 3.9 6.5 
Lagrange to Grafton 
16 coll.’s 0.3 1.6 3.5 5.4 
Per cent. of total 
(by weight) 5.5% 29.6% 64.8% 
Bottom Fauna, 4—7-root Zone, LAGRANGE TO GRAFTON, 1915 
POUNDS PER ACRE 
ae 3 Small 
Viviparidae Insects, 
and Garimens worms, Total 
Pleuroceridae Sphaeriidae Crustacea 
Lagrange dam to Florence 
2 coll.’s 57.5 57.5 
Florence to Kampsville , 
17 coll.’s 0.6 10.3 5.7 16.6 
Kampsville to Grafton 
12 coll.’s 4.8 5.5 10.3 
Lagrange to Grafton 
31 coll.’s Trace 11.2 5.2 16.4 
Per cent. of total 
(by weight) 68.2% 31.8% 
