650 



INDEX 



Coffee production, annual, 574 



Cohesion, in rise of water, 269 



Coincidence in chromosomes, 457 



Cold receptors, 363 



Coleoptera, 101 



Collembola, 99 



CoUip, 396 



Colloid, definition of, 132 



Colon, m2 



Colonial theory, 139 



Colostrum, 625 



Colymbiformes, 113 



Comatrichia, 71 



Commensalism, 56, 492 



Communicable diseases, spread of, 612 



Comparative anatomy, 330 



evolutionary evidence from, 496 

 Competition, relations of, 49-50 

 Complex reflexes, 342 

 Compound eyes, 358 

 Compound reflex arcs, 341 

 Condiments, 277 

 Conditioned behavior, 379-380 

 Conditioned reflex, law of, 380 

 Coneys, 117 

 Conjugation, 411 



Connecting links in evolution, 506 

 Connecting neurons, 376 

 Connective tissue, 338 

 Connective tissue membrane, 329 

 Consciousness, in animals, 383 

 Conservation 



lack of unified program in, 605-607 



methods of, 601-602 



of wild life, 600-601 



organizations for, 602-603 

 Contractile vacuoles, 320 

 Co-ordination by a dorsal tubular nerv- 

 ous system, 344-345 

 Co-ordination by a linear nervous sys- 

 tem, 344 

 Co-ordination by a nerve ring, 343- 



344 

 Co-ordination by a network, 343 

 Copper age, 547 

 Coprolites, 479 

 Copulation, earthworm, 196 

 Coracidia, 230 

 Coraciiformes, 114 

 Corallopsis, 71 

 Corals, 81, 103, 328 



rise of, 513 



skeletons of, 478 

 Cork cambium, 247 

 Corn, linkage and crossing over in, 460 

 Corn stem, cross-section of, ^49 

 Cornea, 359 

 Corpora bigemina, 350 

 Corpora quadrigemina, 350 



Corpus callosum, 348 



Corpus luteum, 399 



Correns, experiments of in heredity, 



443, 446, 467 

 Corrodentia, 100 

 Cortex, adrenal, 392 

 Cortex, cerebral, 348, 545 

 Cortex, kidney, 323 

 Corti, organ of, 370 

 Cortin, 392, 393 

 Costal plates, 328 

 Cotton boll-weevil, 585-586 

 Cousin marriage, 454 

 Cows, breeding of, 453 

 Coxa, 206, 207 

 Crab, horseshoe, 499 

 Crabs, 99, 103, 531 

 Cranial nerves, 351, 352 



oculomotor (III), 350 



trochlear (IV), 350 

 Craniota, 105, 507 

 Cranium, 329, 330 

 Crayfish, 333 



Creation, miraculous, 493-495 

 Creator, 527 



Cretaceous period, 476, 513 

 Cretans, 561 

 Crinoidea, 95 

 Crocodiles, 533 



heart of, 497 

 Crocodilia, 111 

 Cromagnons, 557, 559, 560 

 Crop, 288 



earthworm, 189 



insect, 208 

 Crops, rotation of, 60 

 Cross-fertilization, 412 

 Crossing-over, 4:58-460 

 Crow, 552 

 Crown, tooth, 286 

 Crura cerebri, 350 

 Crustacea, 99, 103, 302 

 Crustaceans, 234, 499, 521, 532 

 Cryptobranchus, 314 

 Crypturiformes, 113 

 Crystalloid, definition of, 132 

 Ctenophora, 83 

 Cucuhformes, 114 

 Cutaneous sense organs, 362-363 

 Cutin, 264 

 Cuttlefishes, 333 

 Cuvier, 516, 517 

 Cyanophyceae, 69 

 Cycles, carbon and oxygen, S8 

 Cyclochaeta, 221 

 Cyclostomata, 105 

 Cynipoidea, 218 

 Cypress (bald), 17 

 Cysticercus, 226 



