INDEX 



425 



Miller, G. S., 27, 346, 347 



Miller, N., 67 



Miner, J. R., 240, 241, 243 



Miner, J. T., 342 



Minnich, D. E., 94 



Minnows, as homomorphic societies, 24 



protection from lead nitrate, 213 

 Mitogenetic rays, 97, 156 

 Mockeridge, F. A., 158 

 Moina, chromosomes, 303 



asexual generations, 304 



male production, 305 

 Moisture control of aggregations, 71 

 Mole cricket, heteromorphic societies, 24 

 Molluscs, 12, 358 

 Monkeys, breeding behavior, 27 



mixed families, 28 



bands, 347, 348 

 Monogamy, 26, 348 

 Monstrillidae, influence of crowding on 



sex, 290, 309 

 Montank, 251, 252 

 Montesquieu, vii 

 Montgomery, T. H., 89 

 Morphological effects of crowding, 311 



wing production in aphids, 313 

 in grasshoppers, 316 

 in Drosophila, 331 

 Morrison, T. F., 90 

 Mortality, fertility and, 136 

 Mosier, C. A., 66 

 Mosquito larvae, 20 

 Mosquitoes, swarms of males, 66 



breeding behavior, 66 

 Moss, pond, protects animals from col- 

 loidal silver, 211 

 Moth, sex recognition in, 89 



larvae, response to substrata! vibra- 

 tions, 96 

 Mottram, J. C, 106 

 Muscina, see Diptera 

 Mutual aid, 348 

 Mutualism, 29, 341 



^^ya, 359 



Myers, E. C, 137, 138, 170, 173, 177 

 Myrmecocoles, relation to ants, 30 

 Mytilus, 13, 16, 36, 311, 358 



Pinnotheres in mantle cavity of, 32 

 Mytilus, gills, reaction with mercuric 

 chloride, 213 



NaCl, mass protection from, 215 



NaOH, effect on male production in 

 Cladocera, 306 

 mass protection from, 216 



Nematodes, sex determination in, 299, 309 



Nemertina, spermatozoa, mass physiol- 

 ogy, 263 



Nereis, lunar rhythm in breeding be- 

 havior, 69 

 aggregations of sperm, 271, 273 



Nests, animals inhabiting those of others, 

 32 



Newman, H. H., 88 



Nice, M., 342, 343 



Nikolsky, V. V., 79 



Noble, G. K., 67 



Nomadacris, see Grasshoppers 



Notonecta, aggregation formation, 52 



Norrish, 125 



Obelia, 35 



Odor integration, 89 

 Oecanthus, synchronous chirping, 93 

 Ohaus, F., 92 

 Oniscus, see Isopods, land 

 Ophiodcrma, formation of aggregations, 

 36, 44, 51, 60, 73, 87, 181 

 menace of crowding, 144 

 autotomy affected by aggregation, 182, 



190, 184 

 oxygen consumption, affected by ag- 

 gregation, 186, 198 

 affected by glass rods, 192 

 mass protection from colloidal silver, 

 202, 205, 207, 208, 209 

 Orang-outan, 348 



Organism, definition and integration, 80 

 Organismal analogy of Spencer, 353 



Origin, of life, 354 

 of society, 338 



Ostracoda, 12, 358 

 Ostriches, heterotypical groups, 30 

 Ostwald, W., 214 

 Overcrowding, 184, 203, 360 

 see Crowding 



Over-wintering aggregations, 70 

 Oxygen consumption, affected by crowd- 

 ing, 181, 184, 186, 192, 195, 280 

 rate of, in isopods, 186 

 in Planaria, 186 

 in Mil sea, 186 



