INDEX 



Central canal, 88 



Central excitatorv state, 100 



Centrioles, 21, 39, 43, 137 



Cephalaspis, 555 



Cephalization, in annelids, 421; in insect 

 nervous s\stem, 4S2 



Cephalochordata, 216, 541. 550-553 



Cef>halodiscus. 541, 543, 544 



Cephalopoda, 216, 370, 388-392; circulatory 

 s\stem, 514; fossil remains, 624; reproduc- 

 tion, 533; skeleton, 528 



Cephalothorax, 480; of blue crab, 441; of 

 crayfish, 426 



Cerata, of Eohs, 385 



Ceralndus, 558 



Cercaria, 330, 331 



Cerebellum, 88, 102 



Cerebral cortex, 96, 102, 103 



Cerebral hemispheres, 88, 96, 102, 103 



C.erebratulus lackus, 341 



Cerebrosides, 26 



Cerebrospinal fluid, 89 



Cestoda, 216, 315, 332-340, 356; cuticle of, 

 528; reproductive systems, 532 



Cestodaria, 333, 334 ' 



Cestodes and trematodes, evolution of, 333 



Cestum veneris, 312 



Cetacea, 580, 589 



Cevlon, apodous amphibians of, 565 



Chactas, 480 



Chaelo8,asler, 415 



Chaetognatha, 216, 219, 221, 344, 365, 543 



Chaetopterus, 401, 402 



Chagas' disease, 463 



Chain reflexes, 100, 452 



Chambers, Robert, 648 



Chameleon, 571. 572 



Cheirolepis, 559 



Chelicerae, 423, 480 



Chelicerata, 216, 422, 423, 424, 480-482; ex- 

 cretory organs of. 519; respiratory organs 

 of, 517 



Chelipcds, 426 



Chelonia, 567, 570 



Chemical coordination, 87, 117, 522; in 

 crustaceans, 525; in insects, 525 



Chemical mediators, in synaptic transmission, 

 525 



Chest, 55, 80 



Chilomonas, 234 



Chilopoda, 216, 423, 478, 479 



Chimpanzee. 587, 638 



China, early man in, 640 



Chipmunk, 590 



Chiroptera, 579, 584 



Chitin, 430, 529 



Chitons, 369, 381, 382 



Chlamydornonas, 265, 266 



Chloragogue cells, 409, 415 



CJilorion, 471 



Chlnrohydrn vindissima, 286 



Chloroplast, Oilamydomonas. 265; Kui;lena, 241 



Choanocvtes, 275, 276, 279, 522 



Choanoflagellates, 242, 243 



Cholecvstokinin, 117 



Cholesterol, 26, 84 



Chondrichthyes, 216, 541, 555, 556, 557 



Chondrocranium, 529 



Chordamesoderm, 152 



Chordata, 88, 216, 217, 221, 224, 226, 368, 

 538-592 



Chorion, 162 



Chorionic vesicle, 161 



Choroid plexus, 88; anterior, 88; posterior, 88 



Chromatid, 136 



Chromatin, 21 



Chromatophores, of squid. 389 



Chromosomal aberrations, 205-206 



Chromosome maps, 201 



Chromosomes, 21, 28, 39. 41, 44; as carriers 

 of genes, 185-194; of Drosop/ula. 42, 194, 

 195; of frog, 42; of man, 42; of Pwlenor, 

 42; reduplication of, 43, 190, 194; salivary 

 gland, 194 



Chronology, from fossil remains, 623 



Chrysalis, 467 



Ckrysaora, 305 



Chrysemys, 567 



Chymotrypsin, 72 



Chymotrypsinogen, 72 



Ctnndela, 464 



Cilia, 60; in feeding of Amphitnte, 401; of 

 Paramecium, 250; of planarian, 316; of 

 rotifers, 345, 346 



Ciliary action, 251 



Ciliary movement, Paramecium, 250-253 



Ciliary-mucus feeding, in Crepidula, 384; in 

 Ctenophora, 310; in Pelecypoda, 372; in 

 polychaetes, 401 



Ciliary muscle, 89, 106 



Ciliata, 216, 229, 248-258; classification, 257 



Ciliates, coordinating mechanisms, 522; inter- 

 actions, 612; reproduction, 530 



Ciliophora, 216, 229 



Cinchona, 246 



Ciona, 545, 546 



Circulating fluids, 50, 54 



Circulating tissues, see Vascular tissue 



Circulation, in colonial hydrozoans, 293; in 

 locust, 450; in starfish, 493 



Circulatory mechanisms of invertebrates, com- 

 parative, 514, 515 



Circulatory system, general functions, 516; of 

 annelids, 513; of ascidians, 547; of brachio- 

 pods, 364; of Branchiosloma, 552; of cephalo- 

 pods, 514; of crayfish, 429, 431, 432, 514; 

 of earthworm, 406, 407; of echinoderms, 

 516; of elasmobranchs. 51; of frog. 52; of 

 insects. 450, 515; of invertebrates, 513-516; 

 of mammals, 52; of nemertines, 342, 513; 



684 



