402 
importantly to weights, making up at the best only about 6 pounds of 
the total acre valuation. 
Borrom Fauna, 1915, Havana To LAGRANGE Dam 
POUNDS PER ACRE, AVERAGE TOTALS 
Reach Channel| 4—7-ft. zone | 1—3-ft. zone 
1. Havana to Lagrange dam (42.5 miles)| 22.0 | 282.6" | 435.5 
2. Foot of Grand Island to Browning 
(9 miles) 12.5 365.6 1,613.4 
Bortom Fauna, 1915, CHANNEL, HAVANA To LAGRANGE Dam (42.5 MILES) 
Small 
Viviparidae _Inseets, 
and Speers ea worms, Total 
Pleuroceridae Sphaeriidae Crustacea 
Number per sq. yard, 
Average 5.5 6.0 3.7 15.2 
16 coll.’s 
Pounds per acre, : 
Average 16.0 3.0 3.0 22.0 
16 coll.’s 
Per cent. of total, 
(By weight) 72.7% 13.6% 13.6% 
Bortom Fauna, 1915, 4—7-roor ZonrE, HAVANA TO LAGRANGE Dam (42.5 MILES) 
Sank 5 Small 
Viviparidae Insects, 
and Oe ee worms, Total 
Pleuroceridae Sphaeriidae Crustacea 
Number per sq. yard, 
Average 73.0 88.0 31.1 192.1 
22 coll.’s 
Pounds per acre, 
Average 234.8 42.1 5.7 282.6 
22 coll.’s 
Per cent. of total, : 
(By weight) 83.0% 14.8% 2.0% 
