4i6 



ANIMAL AGGREGATIONS 



Bluebirds, 343 



Bobolinks, flocks, 343 



Bohn, G., 125, 140, 142, 191, 201, 202, 

 203, 206, 207, 208, 209, 212, 217, 

 219, 222, 223, 235, 259, 265, 274, 

 275, 276, 277, 278, 284, 28s, 354 



Bonellia, polyandry in, 26 



sex determination in, 291, 309, 311 



Bonnevie, K., 266 



Borodin, D. N., 96 



Bottomley, W. B., 158, 159 



Boulenger, G. A., 67 



Bowen, E. S., 62, 63, 90, 95, 345, 346 



Boyer, D. A. D., 76, 77, 317 



Bradley, J. C, 76 



Breeding behavior, 358 



of A sell us, 65 



of dipterans, 66 



of frogs, 66 



of Ambystoma, 67 



of toads, 67 



of fish, 68 



of snakes, 68 



of Nereis, 69 



controls bunching in Asellus, 181 

 Bresslau, E., 202, 212 

 Brewster, W., 79 

 Bridges, C. B., 331 

 Brown, C. R., 28, 61, 62 

 Brown, H., 117 



Brown, L. A., 235, 304, 305, 306, 307, 308 

 Brownlee, J., 115, 142, 143 

 Brues, C. T., 359 

 Bryozoa, polyspermy in, 266 

 Bryozoan colonies, 23 

 Buchanan, R. E., 247, 248, 249, 259 

 Buchsbaum, R., 76, 77, 317 

 Bullheads, see Ameiurus 

 Burgess, E. W., 5 

 Burnet, F. M., 217, 253, 260, 354 

 Burrows, M. T., 150, 152, 153, 166 

 Buttel-Reepen, H. von, vii 



Butterflies, 21, 359 



migrating swarms, 34 



"sleep" aggregations, 75 

 Buxton, P. A., 94, 96, 318 



Caddis-fly larvae, snails, etc., worked 



into case of, 32, 341 

 Calkins, G. N., 168 



Calliplamiis, see Grasshoppers 

 Cancer cells grown in vitro, 166 

 Candolle, A. P. de, 103 

 Capillary tubes, effect of growing Pro- 

 tozoa, in, 122, 136 

 relation of kind of glass to effect 

 produced, 123 

 Carbon-dioxide production, affected by 

 crowding, 184 

 protects from salts, 215 

 from toxic gasses, 239 

 possible role in Drosophila crowding, 



245 



in sperm suspensions, 267, 279, 281, 285 



reaction of sperm to, 272 



saturated sea- water and sperm, 275 

 Carbon tetrachloride, mass protection 



against, 237 

 Carnes, E. K., 359 

 Carpenter, K. E., 212, 213, 214, 258 

 Carrel, A., 106, 149, 150, 151, 152 

 Castellani, A., 259 

 Castes, 351 

 Castle, W. A., 225 

 Catalysis by contact, 125, 219, 278 

 Caterpillars, 18, 20 



migrating swarms, 34 



Szymanski's analysis of social behavior, 

 48, 50, 60 



tropisms, 48, 50 



Deegener's analysis of social behavior, 



49 

 synchronous behavior, 51, 94 

 response to sound, 94 

 response to substratal vibrations, 96 

 menace of crowding, 102 



Catfish, see Ameiurus 



Caullery, M., 301, 302 



Cell aggregates, formation, 45 



Cells, isolated in tissue culture, growth of, 



150 

 Ceriodaphnia, see Cladocera 

 Cerous chloride, effect on spermatozoa, 



278 

 Chalyhion, "sleep" aggregations, 75 

 Champy, C, 157 

 Chapman, R. N., 138, 139, 140, 178, 179, 



180, 244 



Chemotropism, 60 

 in sex recognition, 89 

 in aggregation integration, 89 



Chesney, A., 105 



