794 



INDEX 



Consciousness, emergence of, 108 

 Constrictor, ciliary region, 385 

 venovis sinus, 386 

 visual field, binocular, 684 

 Contractile pupils, occurrence of, 612 

 Conus papillaris, in crocodiles, 378 

 lacertilians, 362 

 avascular, in embryo turtles, 372 

 vestigial, in marsupials, 440 

 Coot. See Fulica. 

 Copepods, 207 

 eyes of, 209 



luminous organs in, 740, 746 

 Copilia, 209 



accoininodation in, 591 

 eyes of, 159, 160, 209 

 vision of, 578 

 Copperhead snake, 387 



posterior segment of eye, 387 

 Cordylosaurus, transparent eyelids of, 



366 

 Corephium., sense organs of, 196 

 Cornea, characteristics in 

 amphibians, 334 

 Anableps, 324 

 birds, 404 

 chelonians, 369 

 chondrosteans, 317 

 coelacanths, 315 

 crocodilians, 376 

 dipnoans, 312 

 fishes, 276 

 holosteans, 321 

 lacertilians, 356 

 lamprey, 265 

 marsupials, 438 

 monotremes, 433 

 placentals, 452, 453 

 selachians, 281 

 snakes, 385 

 teleosts, 294 

 yellow, occurrence of, 656 

 Corneal facet, 157 



nerves in mammals, 454, 455 

 Cornealis muscle, in lamprey, 271 



and accommodation, 645 

 Corpora nigra, 469, 612 

 Corpvis allatum in insects, 555 



cardiacum in insects, 555 

 Corvidae, eyes of, 402 



See also Corvus. 

 Corvus monedula, iris, 408 

 visual acuity of, 663 



Corycceus, 209 

 Cottus, cornea of, 295 



bubalis, eye of, 302 

 Cow. See Cattle. 

 Coypu, 445 



optic axis, 688 



pvipils, 472 

 Crabs, 206 



eyes of, 206 



nervous system of, 521 



sexual cycle, control of, 555 



See also Decapods, Carcinus, etc. 

 Crago (Crangon) vulgaris, 205 



colour changes in, 94 

 vision in, 578 



eyes of, 165, 206 



ommochroines in, 123 

 Crampton's muscle, in birds, 405, 

 406 

 in lacertilians, 357 

 Crane. See Orus. 

 Crane-flies, eyes of, 167 

 Crayfish, 206 



eyes of, 164, 206 



sexual cycle, control of, 555 



See also Crustaceans, Astacus, etc. 

 Crenilabrus, colour changes and colour 

 vision, 625 



rostratus, dorsal light reaction, 76 

 Crepuscular animals, 602 

 Cribriform ligament, 461 

 Cribrina, phototactic reaction of, 571 

 Crinoidea, 184 

 Crocodile tears, 379 

 Crocodilians, 353, 375 



accommodation in, 651, 654 



eyes of, 376 ff., PL VIII 



ocular movements of, 694 



pineal organ, 716 



pupils, contractile, 612 



Purkinje shift in, 628 



refraction of, 639 



retinal pigment, migration of, 614 

 tapetum, 608 



vision of, 599 



visual acuity of, 661 

 field, binocular, 682 

 Crocodilus, 378 



porosus, lacrimal glands, 379 



sclerops, eye of, 354 

 Crossopterygii, 234, 235 



central nervous system, 532 



See also Dipnoans. 



