422 



Index 



PAGE 



Apus 184,263, 318 



aquaria 165, 170 



aquatic animals 180 



" bryophytes 148 



" carnivores 327 



" caterpillars. . . .219, 220, 398 



" collecting 19 



" Diptera 346 



" environment 25 



" fern worts 149 



" herbivores 190, 396 



insects 158, 195, 276 



" larvae 236 



" locomotion 273 



" mammals. . 158, 241, 270, 273 



" microscopy 19 



organisms 99, 389 



" resources 412 



" rodents 153 



" seed-plants 151, 307 



" societies 282, 293 



aquatics, broaddeaved 154 



emergent 151,321,334, 339, 



341 



floating 334, 339 



" rooted 334 



submerged 94, 115, 321,339 



345 



" surface 321,334 



Arcella 159, 160, 299 



armor 246 



armor, chitinous 183, 251 



aroids 157 



arrow-heads . . 272, 334, 345, 380, 405 



Arthropods 183 



arum, arrow. . .157,321,334,380,405 



Asclepias incarnata 345 



Asellus 190, 191, 192, 253, 340 



aspens 378 



Asplanchna 248, 299 



Asterionella iii, 114, 245, 297, 303, 

 305, 308 



Atax crassipes 301 



AzoUa 150, 151, 153, 282, 334 



Bacillus 140 



bacillus, typhoid 141 



back-swimmers 211, 276 



bacteria 20, 48, 100, 139, 141, 296, 

 390 



" chromogenic 140 



" iron 142 



bacteria nitrifjdng 140 



" sulfur 143 



bacterial jelly 140 



Baetis 360 



balancers 370. 



Baltic 18 



barometric pressure 73 



barrier reefs 73 



bars, building of 85 



basins 59, 65, 67, Ji, 356 



bass 233,291,399 



Batrachospermum 136 



bayous 169, 334 



bays 307 



beach 73, 81 



beaver 241, 274, 377, 378 



beetles 195, 220, 275, 276, 277, 281, 

 318, 346 



beetles, adult 338 



" diving. . . .221, 222, 275, 276 



gyrating 407 



" Pamid 260, 359, 367 



" riffle 224, 259 



" whirl-i-gig 221, 338 



Beggiatoa 142, 143 



Belostoma 211 



Benacus 210, 211, 212, 276 



Betten, Cornelius 258 



bicarbonates 51 



Bidessus 333 



Biological Field Stations, Ameri- 

 can ' .22, 23 



Biological Field Station, Cornell 



University, 65, 87, 95, 266, 330, 



335, 397 



Biological Lab., Fairport 23, 79, 291 



birches 378 



birds 231, 239, 249, 390 



Birge, E. A., 36, 37, 38, 43, 44, 46, 47, 

 51, 53, 65, 66, 72, 263, 

 304, 306, 310, 391 



bitterling 292 



bittern 342 



bivalve 180, 185, 288 



blackbird, red-winged 342 



black-fly 227, 264 



bladders 265, 284 



bladderworts, 155, 264, 271, 272, 283, 

 284, 285, 286, 319, 405 



blanket-moss 120 



Blasturus 120, 345, 398 



Blepharoceridae 228 



