INDEX. 



473 



Cilia, 21, 43, 147 



Circulation, 61, 64 



Circulatory organs, 64 ; in Echino- 

 derms, 209 ; in annulata, 225 ; in 

 mollusks, 245, 246 ; in arthropods, 

 279; in vertebrates, 335-340 ; in 

 fishes, 337, 361, 362 ; in amphibia, 

 338, 3755 in reptiles, 339, 384; in 

 birds, 340 ; in mammals, 339, 435 



Cirratulus, 232 



Cirripedia, 288 



Cistudo, 388 



Clam, 234 



Clammatores, 422 



Classification defined, 5; use, 100; 

 illustration of, 101 



Classification protozoa, 153; pori- 

 fera, 163; coelenterata, 177; un- 

 segmented worms, 185 ; annulata, 

 230 ; mollusca, 252 ; arthropoda, 

 288 ; vertebrata, 354 ; fishes, 368 ; 

 amphibia, 379 ; reptiles, 388 ; birds, 

 407 ; mammals, 439 



Cleavage, 32 



Clitellum, 217 



Cloaca, 159, 333 



Clothes-moth, 300 



Clypeus, 269 



Coccyzus, 420 



Cockroaches, 294 



Cocoon, 228, 285 



Ccelenterata, 139, 165 



Coelom (defined), 36; in unsegmented 

 worms, 184; echinoderms, 207; 

 annulata, 223 ; arthropods, 276 ; 

 vertebrates, 322 



Ccelomata and coelenterata, 139 



Coil stage (cell-division), 24 



Coleoptera, 301 



Colonies organic, 112; voluntary, 113 



Color, 120, 367 



Colpoda, 20 



Columba, 416 



Columbae, 417 



Commensalism, 116 



Compound eye, 78, 281, 282 



Condyle, 383, 396 



Conjugation, 67 



Congo-snake, 379 



Connective tissue, 46 



Contractility, 14 (see motion) 



Convolutions (brain), 436 



Coordination, 71 



Corallines, 195 



Corallum, 174 



Corpuscles (blood), 51 



Cotton-boll worm, 300 



Coverts (see feather) 



Coxa, 269 



Crab, 286, 288; larvae, 284, 285 



Crane, 412 



Cranial nerves, 348 



Crayfish, 261, 288 



Crepidula, 255 



Crickets, 294 



Crinoidea, 213 



Crocodiles, 392 



Cro talus, 383 



Crows, 422 



Crustacea, 288 



Ctenophora, 175, 177 



Cuckoo, 419 



Cursores, 408 



Cyclas, 253 



Cyclops, 266, 268 



Cyclostomes, 311 



Cyrtophyllus, 295 



Cyst, 151 



Cystoidea, 213 



Cytoplasm, 19, 25 



Daphnia, 266, 268 



Decapoda, 259, 289 



Deer, 442 



Degeneration, 125 



Dendron, 55 



Dental formula, 433 



Dentine, 50, 432 (teeth) 



Dermis, 323 (see integument) 



Dermo-muscular sac, 222 



Dero, 212, 220, 232 



Derotremata, 3^ 



Development (see metamorphosis) 

 porifera, 163; coelenterata, 175; un- 

 segmented worms, 1 88, 189, 190 ; 

 echinoderms, 211; annulata, 227; 

 mollusks, 249 ; arthropods, 283 ; 

 vertebrates, 342, 343 ; fishes, 366 ; 

 amphibians, 376 ; reptiles, 387 ; 

 birds, 403 ; mammals, 437 



Devil-fish, 257, 258 



Diastroid stage, 23 



Dibranchiata, 259 



Didelphia, 44 



Didelphys, 106 



Differentiation of tissues and organs, 

 27, 37, 40 



Digestion, 60, 61 



Digestive system protozoa, 147; 

 sponges, 161 ; coelenterata, 172; un- 

 segmented worms, 1 86, 187; echi- 

 noderms, 206 ; annulata, 224 ; mol- 

 lusks, 243 ; arthropoda, 276 ; verte- 

 brates, 330 ; birds, 400 ; mammals, 

 433 ; ruminants, 434 



Digestive tract, regions, 331 



