INDEX OF SUBJECTS © 
Ecology—Continued: 
organization of, 23, 25, 32, 33; Physio- 
logical, 299-308; relation to biology, 
315-18; relation to geography, 318-20; 
relation to sociology, 318. 
Economic problems: 9-11; preservation 
of breeding, grounds of fishes, 126. 
Eel, 84. 
Egg-laying, of aquatic insects, 107, 108. 
Electricity, 161. 
Elk, 14, 201, 269. 
Elm: American, 190; coxcomb gall of, 
192. 
England: bird protection in, 8; man- 
made nature in, II. 
Entomostraca, 20, 69, 70, 71, 76, 133, 152, 
176, 179, 204; (see Cladocerans, 
Copepods, and Ostracods); the food 
of young fishes, 76. 
Environment: 42-56, 
299; factor of, 42-44; 
22-33. 
Equilibration: of aquatic communities, 
diagram illustrating, 70; of land 
communities, 166-69; diagram illus- 
trating, 167. 
Erosion, important on clay bluffs, 200, 
210. 
Ethology, 32. . 
Evaporation: 162-65; effect upon 
animals, 162-63; expression of con- 
ditions, 162; of different habitats, 
164; in forest stages, 248-49; reactions 
to, and death by, 163. 
Evaporimeter: Piche, 164; porous cup, 
162. i 
58-67, 157-66; 
relation to, 
Factors in distribution, 299. 
Fairy shrimp, 177-79, 185, 278-709. 
Field study: legal aspects, 56; methods, 
321-24. 
Fish: breeding of, 126; destroyed by 
lampreys, 219; feeding, 130;  longi- 
tudinal distribution in streams, I09, 
IIO, I15, 119, 120; protection, 56, 57; 
traps, 80. 
Fish, scientific names: 
—A bramis, 65: 
crysoleucas, 102, I15, 119, 120, 142, 
143, 156. 
—Acipenser rubicundus, 85. 
Ambloplites rupestris, 85, 99, 119. 
—Ameiurus: 
lacustris, 85. 
melas, 102, 119, 120, 140, 156. 
349 
natalis, 156. 
nebulosus, 156. 
—Amia calva, 156. 
—Anguilla rostrata, 84. 
—A phredoderus sayanus, 120. 
—A plodinotus grunniens, 85. 
—Argyrosomus: 
artedi, 82, 84. 
hoyi, 81, 82, 85. 
nigripinnis, 81, 82. 
prognathus, 79, 80, 82, 85. 
—Boleosoma nigrum, 84, 91, 95, 105, I15, 
I1Qg, 120, 135. 
—Campostoma anomalum, 119, 120. 
—Carpiodes, 85. 
—Catostomus: 
catostomus, 84. 
commersonit, 84, 91, 92, 106, I15, 
IIQ, 120. 
nigricans, 84, 119. 
—Chaenobryitus gulosus, 142, 156. 
—Chrosomus erythrogaster, 91, III, 115, 
IQ. 
—Coregonus clupeiformis, 82, 85. 
—Cristivomer namaycush, 79, 82, 85. 
—Cyprinus carpio, 120. 
—Erimyzon sucetta, 115, 119, 142, 156. 
—Esox: 
lucius, 85, 115, 120, 140. 
vermiculatus, 105, 115, 142, 156. 
—Etheostoma: 
coeruleum, 95, 97, 110. 
flabellare, 95,97, 119. | 
zonalé, 95, 97, 119, 120. 
—Eucalia inconstans, 85. 
—Eupomotis gibbosus, 84, 156. 
—Fundulus: 
diaphanus menona, 84, 123. 
dispar, 120, 132, 135. 
notatus, 119. 
—Hadropterus aspro, 95, 97, 120. 
—Hiodon: 
alosoides, 85. 
tergisus, 85. 
—Hybopsis kentuckiensis, 119. 
—Labidesthes sicculus, 85, 130, 135. 
—Lepisosteus osseus, 85. 
—Lepomis: 
cyanellus, 102, 119, 120, 128, 156. 
megalotis, 99, 119. e 
pallidus, 84, 99, 115, 119, 120, 156. 
—Lota maculosa, 82, 85. 
—Microperca punctulata, 84, 119. 
—Micropterus: 
dolomieu, 85, 99, 119, 120. 
salmoides, 85, 115, 120, 128, 156. 
—M oxostoma: 
aureolum, 84, 115, 119, I40. 
breviceps, 120. 
