INDEX 



Continental drift, 322 

 Continental shelf, 19-21 

 Cooperation, 251-252 

 Copeland, H. F., 103-104, 110 

 Cope's Law, 153 

 Coprolites, 69 



Copulatory organs, of crayfish, 37 

 Corolla, of fused petals, 153 

 Corridors, 315-316 

 Cosmozoic theory, 90-91 

 Cott, H. B., 243, 252 

 Cotylosaurs, 169 

 Countershading, 240 

 Courtship, 275-276 

 Cowles, R. B., 169 

 Crabs, allometry in, 262 

 Crayfish, appendages of, 36-37 



bhnd, 44 

 Creatine phosphate, 59, 60 

 Crepis, 28, 85 



interspecific lethal gene, 279 

 Cretaceous Period, 64 

 Crocodiha, 171 

 Cro-Magnon man, 196 

 Crossing over, 203 



suppressed in Oenothera, 287 

 Crossopterygians, 162, 163, 164-166 



and origin of Amphibia, 164-166 

 Crows, 290 

 Crustacea, 144-145 



embryos, recapitulation in, 45 

 Cryptic coloration, 240-243 

 Cryptobranchits, 57, 58 

 Ctenophora, 137 

 Cuvier, C, 50 

 Cyanogen, 93 

 Cyanophyta, 89, 101-102 



origin of, 124 

 Cycads, 121 

 Cyclostomata, 158, 159 



vertebrae of, 31, 32 

 Cypress, and seasonal isolation, 274-275 

 Cytoplasm, origin of, 92 



Dandelion, 234 

 Darlington, C. D., 229 

 Darlington, P. J., 26, 325, 326 

 Dart, R., 185 

 Darwin, C. C, 337 



Darwin, Charles Robert, 3, 4, 5, 13, 14, 

 16, 21, 22, 23, 25, 26, 29, 30, 39, 45, 

 51, 54, 72, 75, 78-79, 80, 81, 86, 

 212, 239, 249, 251, 270, 272, 308, 

 309, 312, 336 



biography of, 5-12 



education of, 6-7 



marriage of, 7 



mental qualities of, 11-12 



portrait of, 10 



publications of, 7-11 

 Darwinism summarized, 3 

 Datura, 287-288 



inviable Iiybrids of, 278 

 Davis, D. D., 52 

 Dawson, Charles, 191 

 Dawson, Sir William, 114 



DDT, resistance to, 237 

 De Beer, G. R., 52 

 Deer, allometry in, 262 



forelimb of, 38, 39 

 Deficiency, 217 

 Deletion, 217 

 Demerec, M., 208, 333 

 Dendroica, 30, 31 

 Dermoptera, 176 

 Deschampsia, 321 

 Deuterostomes, 148-151 



characters of, 148 

 Devonian Period, 65 

 De Vries, H., 83, 283, 294 

 Dice, L. R., 207, 248, 274 

 Dicotyledoneae, 124 

 Dicyanogen, 93 

 Didelphis, 273 

 Difflugia, 129, 130 

 Dihybridism, 203 



in guinea pigs, 204 

 Dimethyl crocetin, and mating types, 106 

 Dinichthtjs, 162 

 Dinosaurs, 169 



extinction of, 168-170 

 Dioecious, defined, 113 

 Dipleurula larva, 148 

 Diploidy, advantage of, 106 



and sex, 105 

 Diplospondyly, 165-166, 167 

 Dipnoi, 19, 163-164 

 Distribution, circumpolar, 16 



continental, 314 



discontinuous, 15, 315-320 



of fresh-water organisms, 22-23 



of species, 308-326 



problemmatical, 320-321 



theories of, 322-325 

 DNA, structure of, 228-229 

 Dobzhansky, Th., 84-85, 207, 212, 213, 

 222, 238, 252, 253, 255, 257, 267, 

 271, 280, 282, 289, 292, 330 

 Dodson, E. O., 213 

 Dogs, and artificial selection, 331 

 Dollo's Law, 153-154 

 Draparnaldia, 107, 108 

 Drepaniidae, 309-312 

 Drift, continental, 322 



genetic, 258-260 

 Drongos, mimicked, 245-246 

 Drosophila, 203, 206-209, 265, 266 



artificialis, 289 



Bar-eyed, 219-220 



chromosomal mutations and evolution, 

 282 



chromosomes of, 215-216 



courtsliip of, 249-250, 276 



crossing over in, 214 



hairy, 219 



in\'ersions and phylogeny, 222-224 



polymorpliism in, 238 



position effects, 219-220, 222 



selection in, 234-235 



sex determination in, 205 



species distinction, 31 



synapsis in hybrids of, 280-282 



and translocations, 221-222 



342 



