Part 68

Faunal significance of baseleveling, 86

Feeding habits, slugs, 125 snails, 125 Venus mercenaria, 114

Feeding reactions of rose coral, 109

Feeding reflexes of shell-fish, 114

Fertilization of flowers, 142

Field ants, 149

Field naturalist, 37

Field notes, 42 numbers in, 50, 51 recording, 42

Field study, 36, 37, 38 plan, 36

Field work, primary aim, 41

Fish, associations of a lake, 147 associations of Illinois, 140 distribution, 64 ecological succession, 133 environment and distribution, 64 environment, index to, 118 feeding grounds, affected by vegetation, 90 food, 76, 123 food relations of fresh-water, 123 habitats of Illinois, 140 habits, 63, 112 Illinois, 140 lateral-line organs of, functions, 116 life histories, 112 marine vegetation, 89 metabolism, 100 methods of study, 39 of a small stream, 147 organ of sense, 113 organ of taste, 113 physiological responses of, 112 pond, 133 productivity in standing and running water, 101 reaction to atmospheric gases in water, 118 reaction to carbonic acid, 118 reaction to oxygen, 118 rheotropism in, 115 sense of hearing, 116 spawning habits of, 112 stream, 133 submerged vegetation affecting feeding ground, 90

Fitness of environment, 85

Floods of lower Danube affecting biological conditions, 145

Florida mangroves forming animal habitats, 89

Flowers, and insects, 142, 143 animal visitors, 141, 142 bees and, 141 fertilization, 142 pollination of, in relation to animals, 141, 142

Food, beetles, 126 birds, 126, 128, 130 butterflies, 77 Coleoptera, 77 Echinoderms, 126 fish, 123 insects, 128 lizards, 129 nestling birds, 128 oysters, 112 predaceous beetles, 130 serpents, 129 snails, 125 Turbellarian, 127 woodpeckers, 126

Food habits, back beetles, 76 Cerambycidæ, 72 Chrysomelidæ, 72 Coleoptera, 77 grosbeaks, 128 larval Acalyptrate Muscidæ, 78 longicorn beetles, 77 Rhynchophora, 72 snout beetles, 76

Food of animals, in Kiel Bay, 129 of sea-bottom, 63, 136

Food plants, of Coleoptera, 77 of forest insects, 76

Food relations, Carabidæ, 127 cave animals, 144 Coccinellidæ, 127

Forest influences, 90

Forest insects, classified by food plants, 76 life histories, 74 literature, 74

Forest invasion on alluvial flats, 89

Forest types, determining, 89

Foresters, nature’s, 124

Forestry, 58

Forests, insect depredations in, 127

Form regulation, 97