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 



" fernworts 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, broad-leaved 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 in, 114, 245, 297, 303, 

 305, 308 



Atax crassipes 301 



Azolla. .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 



PAGE 



bacteria nitrifying 140 



sulfur 143 



bacterial jelly 140 



Baetis 360 



balancers 370 



Baltic 1 8 



barometric pressure 73 



barrier reefs 73 



bars, building of 85 



basins 59,65,67,71,356 



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, 



3i, 346 



beetles, adult 338 



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



gyrating 407 



Parnid 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, 

 5i, 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 



