INDEX 



737 



Commissures, circumpharyngeal, of 

 earthworm, 167 

 of leech, 183 



visceral, of mussel, 281 

 Conchiolin, 266 

 Concretion, calcareous, round spinal 



nerve, 384 

 Conduction, 13 



in nerve, 612 



in nerve net, 94 

 Conductivity, 14 

 Condyle, occipital, 352, 426. See 



also Skull 

 Cone, oral, 90, 96 

 Cones of retina, 534 

 Conies, 491 

 Conjugants, 52 

 Conjugation, 6, 52 



in Ciliata, 53 



of Paramecium, 52 



of Vorticella, 58 

 Conjunctiva, 465 

 Connective tissue, 506 

 Contractile fibre of Vorticella, 57 



processes of cells of Hydra, 97 

 Contraction, 13 



Conus arteriosus, 596. See Heart 

 Convergence, 484 

 Convolutions, cerebral, 460 

 Copepoda, 221 

 Coprodaeum, 408 

 Copromonas, 4, 41, 79 

 Copulation, 6, 123, 175, 269, 335, 



457 

 Coracoid process, 435 



Corals, 113, 147 



Cord. See Spinal cord, Nerve cord. 



Spermatic cord. Vocal cords 



Corium, 527 



Cornea, 536 



of crayfish, 213 



of sheep, 465 

 Cornua, of hyoid, 356 

 Coronella austriaca, 550 

 Coronoid process, 430 

 Corpora allata, 227, 248 



quadrigemina, 461 



striata, 387, 415, 460, 610 

 Corpus albicans, or mammillare, 461 



callosum, 459 



luteum, 471 

 Corpuscles, blood, 524. See also 

 Blood 



bone, 518 



connective tissue, 515 

 Cortex, cerebral, in rabbit, 460 



of kidney, 539 



of Paramecium, 47 



Cortex, of adrenal bodies, 367 



of green glaftds, 211 

 Corti, organ of, 469 

 Costa of wing, 231 

 Costal pit, 424 

 Cotylosauria, 578 

 Coverts, 394 

 Coxopodite, 197 

 Crab, hermit, 147 

 Crab-louse, 148, 253 

 Crabs, 221 

 ' Crabs' eyes,' 205 

 Crane-flies, 260 

 Cranial flexure, 639, 663 



nerves. See Nerves, cranial 

 Craniata, 542 



Cranium, 316, 425. See also Skull 

 Crawling, 359. See also Loco- 

 motion 

 Crayfish, J95, 221 



abdomen of, 195, 229 



alimentary system of, 203 



blood vessels of, 205 



coelom of, 211 



cuticle of, 195, 198 



development of, 217, 671 



epidermis of, 198 



excretory organs of, 210 



eye of, 196 



gills of, 209 



habits and external features of, 



195 

 limbs of, 196, 197, 199 



locomotion of, 201 



mouth appendages of, 197, 199 



nervous system of, 211 



reproduction of, 216 



respiratory organs of, 209 



segments of, table of, 199 



sense organs of, 213 



skeleton and muscles of, 201 

 Creation, 709 

 Creodonts, 487 

 Crest, cnemial, 436 

 Cribriform plate, 427, 574 

 Crickets, 249 

 Crinoidea, 297, 298 

 Crithidial phase, 68 

 Crocodile, 549 



skull of, 580 

 Crocodilia, 550, 579, 604 

 Crop of cockroach, 232 



of earthworm, 162 



of leech, 182 



of pigeon, 406, 594 



of snail, 267 

 Cross-fertilisation, 44 

 Crossing-over, 692, 697 



