536 



GENERAL BIOLOGY 



Assimilatory parenchyma . 120 



Association fibers 4 6 3 



Aster 293 



Atrophy 252 



Attitude 425 



Auditory nerve 463 



Auk 7 



Auricle 187 



Autogenetic responses . . . 474 



Avoiding reaction 73, 440 



Axial skeleton 181 . 



Axone 45 



Back boned animals 180 



Bacteria 69, 97, 173 



Balance in nature 6,325 



Barbarian 500 



Beak 240, 242 



Bee 8,458 



Behavior of organisms .... 435 



Bilateral symmetry 288 



Bile duct 186 



Bimana 485 



Binder 251 



Biogenetic law 257 



Bibphores 301 



Birch . . . 341 



Bird's brain 201 



Birth 217 



Birthrate 327, 501 



Bison 7 



Bittern 398 



Bladderwort 252 



Blastopore 171 



Blastula 171, 255, 358 



Blended inheritance . . .310, 316 



Blood gills 408 



Blood vessels 201 



Blue flag 380 



Body cavity 164 



Bodyplasm . .113, 291, 296, 363 



Bones 184 



Bombus : 431 



Bombylius major 34 



Brain ...189,196,257,455,486 



Brain paths 458 



Bread making 94 



Breast bone 42 



Breeding habits 44 1 



Bronchial tubes 187 



Brooks quoted 368 



Blepharocera 244 



Bryophytes 118 



Bryozoans 336 



Budding ; ... .92, 331 



Buds 158 



Bud variation 332 



Bumblebee 30, 429 



Burdock 476 



Burdock moths 425 



Bur marigold 271 



Butter and eggs 273 



Buttercup ir 



Butterfly 21, 24 



By-paths in the nervous 



system _ 452 



By-paths of the brain .... 465 



Caddisfly 475 



Caddis-worms 477 



Callings 505 



Calosoma 417 



Calyptra 126 



Cambarus 233 



Cambium 145, 361 



Canoe 492 



Capillitium 102 



Carbohydrates 83 



Carbon 130 



Carbon dioxide 83 



Cardo 18 



Carmine 73 



Carpus 259 



Carriers 523 



Carrion beetle 420 



Carrion flower 476 



Case building 479 



Castle quoted 314 



Castration 319, 443 



Casualties 6,276 



Caterpillars 472 



Cat fishes 242 



Cave bear 495 



Cave dwellers 500 



Cecidomyidas 44 



Celithemis 410 



Cell differentiation 170 



Cell division 109, 121, 293 



Cell multiplication 170 



Cell wall 58, 59 



