548 



INDEX 



Cortex (of brain), 447 

 Corvidae, 431 

 Cotton-boll worm, 305 

 Coverts (see feather). 

 Coxa, 273 



Crab, 290 ; larvae, 288, 289 

 Crane, 418 

 Cranial nerves, 353 

 Crayfish, 266, 294 

 Crepidvla, 261 

 Crickets, 298 

 Crinoidea, 220 

 Crocodiles, 397 

 Crop, 335 

 Crossopterygii, 373 

 Crotalus, 388 

 Crows, 426 

 Crustacea, 293 

 Ctenophora, 186 

 Cuckoo, 42s 

 Cursores, 412 

 Cyclas, 259 

 Cyclops, 270, 293 

 Cyclostomes, 314 

 Cyst, 159 

 Cystoidea, 220 

 Cytology, 522 

 Cytoplasm, 20, 27 



Damsel flies, 299 



Daphnia, 293 



Decapoda, 264 



Deer, 454 



Degeneration, 132 



Dendron, 62 



Dental formula, 444 



Dentine, 51, 444 (teeth). 



Dermaptera, 300 



Dermis, 327 (see integument). 



Dermo-muscular sac, 229 



Dero, 225, 227 



Derotremata, 384 



Development (see metamorphosis) — 

 porifera, 171; coelenterata, 184; un- 

 segmented worms, 192, 197; echino- 

 derms, 219; annulata, 234; moUusks, 

 254; arthropods, 287; vertebrates, 

 346, 347; fishes, 370; amphibians, 

 380; reptiles, 391; birds, 408; mam- 

 mals, 448 



Development of zoology, 518 



Devil-fish, 263 



Diastroid stage, 24, 25 



Dibranchiata, 263 



Didelphia, 451 



Didelphys, 117 



Differentiation of tissues and organs, 

 29, 41, 48, 85 



Digestion, 67, 68 



Digestive system — protozoa, 155; 

 sponges, 170; coelenterata, 181; echi- 

 noderms, 213; annulata, 230; mol- 

 lusks, 249, arthoropoda, 281; verte- 

 brates, 332, 392; birds, 405; mam- 

 mals, 444; ruminants, 445 



Digestive tract, regions, 334 



Dimorphism (sexual), 76 



Dinosaurs, 386, 487 



Diphyllobothrium, 205, 206 



Dipnoi, 374 



Dipodomys, 456 



Diptera, 301 



Direct cell-division, 23 



Discophora, 239 (leeches). 



Dispersal of animals, 136 



Dissimilation, 16 (katabolism). 



Distribution, geographical, 4, 138 



Division (cell), 23, 25 



Division of labor, 29, 66 



Dogs, 4SS 



Domestication of animals, 106, 514 



Dominance, 500 



Dorsal vertebrae, 330 



Dorso-ventral axis (see symmetry). 



Dove, 424 



Draco, 395 



Dragon flies, 299 



Duck-bill, 440 



Ducks, 413 



Ductless glands, 341 



Ductus Cuvieri, 365 



Dugong, 453 



Eagle, 420 



Ear, 355 (see auditory organs). 

 .Earthworm, 223 

 Earwigs, 300 

 Echidna, 450 

 Echinodermata, 147, 208 

 Echinoidea, 221 



