158 



INDEX 



Cryptozoic fauna of Australasia, 



144 

 Cuckoo, 



behavior, 113 



life, 113 



Cultivation of turtles, 110 

 Cycle of matter, in the sea, 87 

 Cycles, vegetative, causes, 88 



Dace, horned, 63 



Danish lakes, plankton investiga- 

 tions, 140 



Danish waters, ecology of grass- 

 wrack in, 89 



Danube and its delta, biology af- 

 fected by floods, 145 

 Death feigning, 



Belostoma ( Zaitha) flumineum 



Say, 118 

 instinct, 113 

 Nepa apiculata Say, 118 

 Ranatra, 113 



Death of lower organisms, 97 

 Decrease of birds, 124 

 Describing environments, 45 

 Descriptive method, 14 

 Desert species, 



of Amphibians, 148 

 of reptiles, 148 

 Determination, 



of specimens, 49, 51 

 of specimens at museums, 52 

 Determined specimens, series of, 



62 



Development, 92, 93 

 ants, 120 

 effect of environment on mol- 



lusks, 100 



environment, 45, 46 

 individual, 97 

 oysters, 112 

 optima, 94 

 problem, 98 

 Developmental or explanatory 



method, 14, 15 



Digestion in cold-blooded verte- 

 brates, influence of season and 

 temperature, 100 

 Diptera, 



aquatic nematocerous, 75 



catalogue of North American, 71 



North American, catalogue, 71 

 Directions for collection, 39, 57 

 Directory, Naturalist's, 53 

 Disadvantages of non-ecological 



surveys, 31 



Diseases, mussels, 119 

 Distribution, 



fish, 64 



Planarians, local, 119 



vertically of Chsetognatha, San 



Diego region, 115 

 Domestic animals, 132 



psychic development of young, 



115 



Dominance, 47 

 Dominant animals, 47, 48 

 Donaciinae, natural history of larvae, 



109 



Dragon flies, vs. mosquitoes, 72 

 Dragon-fly nymphs, 



ecology, 118 



keys, 75 



reactions to contact and light, 



118 

 Drinking habits, 



butterflies, 119 



moths, 119 

 Drosophila, 



convulsive reflexes, 109 



reactions, 109 

 Dunes, bee fauna, 139 

 Dynamic conceptions, 80 

 Dynamic principles, 86 

 Dynamic relation, 85 

 Dynamic relations, 



of aggregations, 130 



of associations, 130 



of environment, 82 

 Dynamic standpoint, 91, 101 

 Dynamic status, 29, 31 

 Dynamic theory and physiological 



problems, 97 



Dynamical interpretation, 82 

 Dynamics of living matter, 96 



Earthworm, 



behavior modifiable, 105 

 movements, 105 

 quantitative studies, 58 



