172 



INDEX 



Plethodon cinereus erythronotus, 

 habits, 117 



larval state, 117 

 Poduridse, 



behavior and habitat, 136 



movements, 136 

 Poisons, physiological effect of 



certain, 99 

 Pollination, animals in relation to, 



141 

 Pollination of flowers, animals in 



relation, 141, 142 

 Pollination of Yucca, 142 

 Pond, 



fauna, 148 



fish, ecological succession, 133 



habitat, 148 



Isopods, 106 



Pond snail, behavior, 120 

 Pond, solution, 148 

 Ponds, seasonal succession in old 



forest, 140 



Porcupine mountains, 91 

 Postglacial dispersal of biota, 91 

 Potassium cyanide, effects on sea- 

 urchin, 99 



Potato beetles, see Leptinotarsa 

 Predaceous beetles, food, 126, 130 

 Preservation of specimens, 49, 50 

 Preserves, natural, 34, 38 

 Principles, value of general, 41 

 Process, animal behavior as a, 102 

 Process method, 



application, 86 



of investigation, 56 

 Process of adjustment, 30, 31 



in organisms, 122 

 Process of response, 4 

 Process standpoint, 91, 101 



applied to vegetation, 88 

 Processes, 



geologic, 86 



of behavior, 93 



of development, 93 



of growth, 93 



of metabolism, 93 



of research, 55 



regulatory character of physico- 

 chemical and physiological, 85 



standpoint, 80, 81, 82 



Production, conditions of, in the 



sea, 87 



Proof, correction, 68 

 Proof-reading, 65, 68 

 Propagation, artificially, of fresh- 

 water mussels, 114, 115 

 Protection, 

 of birds, 124 

 of useful birds, 127 

 Protective coloration, 62 

 Protoplasm, influence of stimuli 



upon, 95 



Protoplasmic respiration, 97 

 Psychic, 



criteria, 106 



development of young domestic 



animals, 115 

 Psychology, 



comparative, 120 



comparative, French work in, 107 



English sparrow, 117 



limits of comparative and genetic, 



109 



of ants, 120 

 Publication, preparation of papers 



for, 65, 68 

 Punctuation, 68, 69 



Quahaug, 

 growth, 108 

 life history, 108 

 Quantitative determination of fauna 



of lower Elbe, 138 

 Quantitative study, 61 



animal life of sea-bottom, 63, 124, 



136 



of birds, 59, 60 

 of life of sea-bottom, 63, 124, 



136 



Quarnerian Gulf, animals asso- 

 ciated in the, 135 



Rabbits, 28 



Raccoon, animal intelligence, 111 



Raccoons, 



instincts, 110 



intelligence, 110 



sense, 110 



visual discrimination, 110 

 Ranatra, death-feigning, 113 



