Part 80

Photography, 57, 59, 61, 65 aquatic animals, 63, 64 birds, 39 fish, 39 mammals, 39 nets of Hydropsyche (aquatic), 64

Phototaxis and random movements, 105

Phototropism of Mourning-cloak butterfly, 116

Phylogeny, 21, 96 of human behavior, 133

Physa, biology, 110

Physical change, influence upon animals, 85

Physiographic ecology of Chicago, 88

Physiological chemistry, 95

Physiological classification, and ecological succession, 21 in ecology, 101, 133, 134

Physiological conditions, 92, 93

Physiological life histories of plants, 17

Physiological problems and dynamic theory, 97

Physiological responses, distribution due to, 101, 112, 136 of fish, 112

Physiological states and rheotaxis in Isopoda, 106

Physiology, comparative, 95 general, 95 of organisms, 96 of organs, 96 of reproduction, 100

Phytogeographical nomenclature, 22, 60

Pigeon, common, 117 homing, 113 passenger, 117

Pigeons, emotion in, 110 methods of homing, 113 voices as means of social control, 106, 134

Planarians, behavior, 120 distribution locally, 120 reactions of fresh-water, 116 reactions to light, 105

Plane table manual, 64

Plankton, 60, 148 ecological study, 140 investigations of Danish lakes, 140 of Illinois river, 147 of Shawnee Cave, ecological study, 145 organisms, 50

Plant animals, 128

Plant ecology, 59 bibliography, 89 general principles, 88, 89

Plant formations, stable and migratory, 88

Plant galls, 143 animals in relation to, 141 biology and causes of European, 143

Plant societies, relation to evaporation, 64, 90 relation to humidity, 90 study of Chicago, 88

Plant succession, 90 relation to distribution of tiger beetles, 90

Plants, and ants, 126, 127 and snails, 125 forming animal habitats, 89 influence upon insects, 135 life histories, physiological, 17 seasonal succession, 140 variation, 96