Part 76

Modifiability of behavior of Hydroides Dianthus V., 106

Modifications, of behavior, 93 of behavior by experience, 106

Molluscan associations, local, 137

Molluscan succession, associational study, 137

Mollusk fisheries of Massachusetts, 108

Mollusks, associations, 138 collecting, 58 ecology, 147 effect of environment, 100 habitats, 138, 145, 147 habitats in fresh water, 147 of Louisiana, marine food, 114 of Skokie Marsh area, ecology, 137

Mongoose, 28

Morphology, experimental, 95

Mosquitoes, Dragonflies vs., 72

Moth, Yucca, 142

Moths, drinking habits, 119 reactions, 106

Mourning-cloak butterfly, phototropism, 116

Movements, physiology, 107

Mucus, function of, in shell-fish, 114

Mud snail, behavior, 111

Multiple working hypotheses, 55

Muscidæ, Acalyptrate, 78

Museum exhibit of American birds, ecological, 145, 146

Museums, determination of specimens at, 52 relation to ecology, 22 use of ecological ideas, 145, 146

Mussels, artificial propagation of fresh-water, 114, 115 diseases, 119 eaten by Fulgur, 110 eaten by Sycotypus, 110 enemies, 119 pearly fresh-water, enemies and diseases, 119 pearly fresh-water, habits, 119 pearly fresh-water, protection, 119 reproduction of fresh-water, 114, 115

Mutation theory and ethology, 22

Mutual aid, a factor of evolution, 133

Mya arenaria, growth, 114 life history, 114

Myriapods, collecting, 58 systematic literature, 71

Nassa obsoleta, 110

Natural conditions of existence, 96

Natural environments, 26

Natural history, 18 American lobster, 113 Amia calva L., 117 Amphithoe, 113 honey-bee, 109 larvæ of Donaciinæ, 109 starfish, 115 surveys, 23, 30