INDEX 



419 



Cynipidse, 181 



Cystoflagellata, classified, 268 



Cytol>lastema, 70 



Cytology, 2 



Cytoplasm, 31, 32, 66, 171, 214, 215; 



di\"ision of, 78; finer structure of, 



35; in heredity, 255 



Dark ages, 9 



Dark bands, in muscle, 113 



Darwin, Charles, 21, 22, 23, 252, 340, 

 341, 342, 360; autobiography of, 

 341; relation to evolution theory, 

 339 



Darwin, Erasmus, 20, 22 



Darwinism, 359 



Decapoda, classified, 270 



Deer, congregation of, 278; extinction of, 

 307 



Delamination, 221, 222, 223 



DeUinger, 61, 62 



Demospongise, classified, 269, 272 



Dendrite, 114, 142, 159, 160, 161, 163 



Dendritic colony, 85-87 



Dentine, 322, 323, 327 



Dermatozoa, 263 



Dermoptera, classified, 271 



Descent, 18 



Determination of sex, 239, 252, 253 



Deutero-albumoses, 146 



Development, 27; embryonic, 28; me- 

 chanism of, 235-238 



Devonian, in time scale, 315 



De Vries, Hugo, 344 



Dextrose, 145, 146, 147 



Diastase, 56 



Diaulula, 77 



Dibranchia, classified, 269 



Dichogamy, 190 



Didelphia, classified, 271 



Differentiation, 84, 91, 92, 93, 102 



Diffusion, 43, 147 



Digenea, classified, 269 



Digestion, 54, 55, 56, 57; amino-acids in, 

 145, 146, 147; of cellulose (see Cellu- 

 lose); in duodenum, 144; fatty acids 

 in, 145, 147; of fats (see Fats); glyc- 

 erol in, 145, 147; in Hydra, 146; in 

 large intestine, 146; in man, 143; in 

 mouth, 143, 144; of proteins (see Pro- 

 teins); in small intestine, 146; of 

 starch (see Starch) ; in stomach, 144; 

 of sugar (see Sugar) 



Digestive apparatus, in ccclenterates, 

 115; simplest, 115, 116 



Digestive system, 114; of Annelida, 117; 

 in invertebrates, 116; in Nemathel- 

 minthes, 116; in rhabdocoele Turbol- 

 laria, 116;in triclad Turbellaria, 116; 

 invertebrates, 117-120 



Digestive tract, 224; derivatives of, 226- 

 229; muscles of, 156 



Digger wasps, disposition of eggs, 198 



Digits, 138, 325 



Dinobryon, 85 



Dinobryon sertularia, 86 



Dinoflagellata, classified, 268 



Dinornithiformes, classified, 271 



Dinosaurs, 332, 333, 334; footprints of,313 



Dioecious, 184; species, fertilization in, 

 192 



Diplopoda, classified, 270 



Diplozoon paradoxum, 278 



Dipnoi, classified, 270, 274 



Diptera, classified, 270 



Direction of evolution, 360 



Direction of mutation, 360 



Discomedusse, classified, 269 



Distributed nucleus, 32 



Distribution, accidental, 291, 304; of 

 cotton boll weevil, 304; discontinu- 

 ous, 291, 302; factors of, 299; by 

 man, 291, 305; method of, 307; of 

 rabbit, 304. (See also Zoogeog- 

 raphy and Range.) 



Disuse, in evolution, 359 



Division of cytoplasm, 78 



Division of labor, 84,91, 92, 102 



Dominance, partial, 244 



Dominant, 244 



Donacia piscatrix, food of, 281 



Dorsal, 105 



Dorsal aorta, 124 



Dorsal blood vessel, of earthworm, 119 



Dorsal horn, of gray matter in spinal 

 cord, 142 



Dorsal root, of spinal nerve, 229, 230 



Dorsal root ganglion, 142 



Dromedary, 329. (See also Camelus.) 



Dromia, sperm of, 216 



Drones (bees), 181 



Drosophila, 241, 242, 254; chromosomes 

 of, 240; as a complex heterozygote, 

 363; mutations in, 344 



Drosophila mclanogaster, 79; mutations 

 in, 345 



