536 



INDEX 



Connective tissue, 53-58 



Contractility, 15 (see motion). 



Contributors to zoology, 509 



Convolutions (brain), 446, 468 



Coordination, 76 



Corallines, 202 



Corallum, 182 



Corals, 185 



Corpuscles (blood), 57 



Corrodentia, 298 



Cortex (of brain), 446 



Corvidae, 430 



Cotton-boll worm, 304 



Coverts (see feather). 



Coxa, 272 



Crab, 289 ; larvae, 287, 288 



Crane, 417 



Cranial nerves, 352 



Crayfish, 265, 293 



Crepidula, 260 



Crickets, 297 



Crinoidea, 219 



Crocodiles, 396 



Crop, 334 



Crotalus, 387 



Crows, 425 



Crustacea, 292 



Ctenophora, 185 



Cuckoo, 424 



Cursores, 411 



Cyclas, 258 



Cyclops, 269, 292 



Cyclostomes, 313 



Cyrtophyllus, 299 



Cyst, 158 



Cystoidea, 219 



Cytology, 512 



Cytoplasm, 20, 27 



Damsel flies, 298 

 Daphnia, 292 

 Decapoda, 263 

 Deer, 453 

 Degeneration, 130 

 Dendron, 61 

 Dental formula, 443 

 Dentine, 50, 443 (teeth). 

 Dermaptera, 299 



Dermis, 326 (see integument). 



Dermo-muscular sac, 228 



Dero, 224, 226 



Derotremata, 383 



Development (see metamorphosis) 

 porifera, 170; ccelenterata, 183; un- 

 segmented worms, 191, 196; echino- 

 derms, 218; annulata, 233; mollusks, 

 253; arthropods, 286; vertebrates, 

 345i 346; fishes, 369; amphibians, 

 379; reptiles, 390; birds, 407; mam- 

 mals, 447 



Development of zoology, 508 



Devil-fish, 262 



Diastroid stage, 24, 25 



Dibranchiata, 262 



Didelphia, 450 



Didelphys, 115 



Differentiation of tissues and organs, 

 29, 41, 47, 84 



Digestion, 66, 67 



Digestive system protozoa, 154; 

 sponges, 169; ccelenterata, 180; echi- 

 noderms, 212; annulata, 229 ; mollusks, 

 248; arthoropoda, 280; vertebrates, 

 33 it 39i; birds, 404; mammals, 443; 

 ruminants, 444 



Digestive tract, regions, 333 



Dimorphism (sexual), 75 



Dinosaurs, 385; 485 



Dipnoi, 373 



Diptera, 300 



Direct cell-division, 23 



Discophora, 238 (leeches). 



Dispersal of animals, 134 



Dissimilation, 16 (katabolism). 



Distomum, 196 



Distribution, geographical, 4, 136 



Division (cell), 23, 25 



Division of labor, 29, 65 



Dogs, 454 



Domestication of animals, 105, 504 



Dominance, 493 



Dorsal vertebrae, 329 



Dorso-ventral axis (see symmetry). 



Dove, 423 



Draco, 394 



Dragon flies, 298 



Duck-bill, 439 



