800 



INDEX 



Eupagurus, 58 



orientation to polarized light in, 73 

 telotaxis in, 56, 58 

 Euphagus cyanocephalus, iris, 408 

 Euphausiopsin, 121 

 Eupolyodontes, ocelli of, 192 

 Euproctis, larva, phototaxis in, 46 

 Eurypterids, 157 

 eyes of, 157 



origin of vertebrates through, 233 

 Euselachii, 279 

 eyes of, 282 

 Eutheria. See Placentals. 

 Evarcha blancardi, 580 



vision of, 580 

 Evermanella, tapetum, non-occlusible, 305, 

 608 

 tubular eyes in, 324 

 Exocone eye, 168 



Extra-ocular muscles. See Muscles. 

 Eyebrows, in mammals, 492 

 Eyelids, characteristics in 

 anurans, 344 

 birds, 423 

 chelonians, 374 

 crocodilians, 378 

 lacertilians, 366 

 monotremes, 436 

 placentals, 491 

 selachians, 289 

 snakes. 392 

 teleosteans, 311 

 urodeles, 349 

 movements of, in vertebrates, 491 

 third. See Nictitating membrane. 

 Eyes, characteristics in 

 invertebrates, 125 

 arachnids, 160, 211 

 brachiopods, 195 

 chsetognaths, 194 

 ccelenterates, 182 

 crustaceans, 163, 206 

 echinoderms, 185 

 insects, 166, 220 

 molluscs, 196 

 myriapods, 210 

 Peripatus, 204 

 polyzoa, 194 

 rotifers, 194 

 worms, 188, 190 

 protochordates, 227 

 vertebrates, 248 

 amphibians, 333 



Eyes, characteristics in 

 anurans, 334 

 urodeles, 346 

 birds, 397 

 cyclostomes, 259 



ammocoete larva, 261 

 lamprey, 263 

 fishes, 273 



chondrosteans, 315 

 coelacanths, 314 

 dipnoans, 312 

 holocephalians, 290 

 holosteans, 321 

 selachians, 279 

 teleosts, 291 

 mammals, 429 

 marsupials, 438 

 monotremes, 431 

 placentals, 446 

 reptiles, 353 



chelonians, 368 

 crocodilians, 375 

 lacertilians, 355 

 snakes, 383 

 Sphenodon, 379 

 amphibious, in fishes, 324 



in insects, 224, 225 

 cerebral, of rotifers, 194 



of vertebrates, 237 

 compound, 153 

 acone, 167 

 apposition, 169, 173 

 composite, 160 

 eucone, 167 

 exocone, 168 

 fast, 584, 706 

 pseudocone, 167 

 slow, 584, 706 

 superposition, 169, 174 

 degenerate, 721 

 emergence of vertebrate, 242 

 evolution of vertebrate, 233 

 median, 711 



migratory, in fishes, 328 

 ontogeny of vertebrate, 239 

 parietal, 713 



phylogeny of vertebrate, 237 

 pineal, 713 

 rudimentary, 721 

 simple, 129 

 aggregate, 151 

 composite, 152 

 cupulate, 137 



