6io 



INDEX 



Cerebral nerves, see Nerves 



Cerebral vesicles, 584 



Cerebro-pleural ganglion, 408 



Cervical groove, 361 



Chcetopoda, 350 



Chalaza, 565 (Fig. 148) 



Change of function, 449, 537 



Chela, 364, 366 



Cheliped, 364 



Chiasma, optic, 164, 459, 530 



Chick, see Bird 



Chitin, 232, 328, 361 



Chlorophyll, 242, 251 



Choroid, 183,556 



Choroid fissure, 588 



Choroid plexus, 157, 529 



Chromatin, 129, 231, 558, 561 



Chromatophores, 243, 



Chromosomes, 561 



Cilia, and ciliary movement, 109, 

 242, 250, 265, 271, 280 



Cilia, absence of in Crayfish, 386 



Ciliary folds, muscles, nerves, and 

 vessels, 184, 534 



Ciliata, Ciliate Infusoria, 261, 292 



Circulation of blood, 86, 89, 337, 

 375, 407, 425, 449, 520 



Circulatory organs, see Blood- 

 vessels and Lymphatic system 



Cirri, 352, 421 



Clasper, 433, 442, 469 



Class, 219 



Classification, 217, 220, 223, 411 



Clavicle, 47, 501 



Clitellum, 327, 348 



Clitoris, 541 



Cloaca, 23, 401, 445 



Cloacal aperture, see Anus 



Cnidoblast, 302 



Cnemial crest, 504 



Cnidocil, 302 



Coagulation of blood, 78, 107 



Cochlea, 187, 535 



Cocoon, 328, 348 



Ccelenterata, 321 



Ccelome, 20, 203, 322, 328, 401, 

 422, 434, 506 ; development of, 



203, 579, 584 

 Ccelomata, 322 



Coelomic epithelium, 330, and see 

 Epithelium 



Ccelomic fluid, 336 



Collaterals, 171 



Colon, 514 



Colony, Colonial organisms, 277 



Columella, 45, 189 



Commissures, see Blood-vessels and 

 Nervous system ; of Brain, 531 



Conchiolin, 399 



Concrescence, 361 



Condyle, occipital, see Skull 



Cones of retina, 185 



Conjugation, 197, 237, 251, 268, 

 274, 283, 286, 287, 308, 571, and 

 see under development of various 

 types 



Conjunctiva, 182 



Connectives, 379, 408 



Connective-tissue, 18, 113 



Contractility, nature of, 112 



Conus arteriosus, 79, 88, 449, 520 



Coracoid, 47, 443 



Coracoid process, 500 



Cordylophora, 325 



Cornea, 182, 354, 380,555 



Coronoid process, 496 



Corpus adiposum, see Fat- body ; 

 callosum, 528 ; cavernosum and 

 spongiosum, 540; striatum, 531 



Corpuscles, see Blood-corpuscles 

 and Leucocytes 



Cortex of Brain, 160, 528 



Cortical layer, 264, 269, 280, 286 



Craniata, 421 



Cranium, see Skull 



CRAYFISH : general characters, 360, 

 386 ; limited number and con- 

 crescence of metameres, 360 ; 

 appendages, 363, 393 ; exo- 

 skeleton, 361, 363, 387, S94> 

 muscular system, 369, 390, 392 , 

 enteric canal, 370, 390 ; gills, 

 374, 388', kidney, 375, j?j; 

 blood-system, 375, 389 ; nervous 

 system, 379, 392 ; sense-organs, 

 380, 393 ; reproductive organs, 

 382, 390 ; development, 383, 580 



Creation, 221 



