INDEX 



817 



Miiller (H), muscle of (ciliary), in birds, 

 406 

 (orbital), in mammals, 496 

 (palpebral), in mammals, 492 

 Johannes, 154 

 Miiller-Lyer illusion, 703 

 Murex, 197 



ocelli of, 142, 197 

 regeneration of eye, 136 

 Miis. See Mouse. 

 Musca domestica, 172 

 eyes of, 167, 172 

 maggot of, 50 

 klinotaxis in, 50 

 ocellus of, 137, 139 

 visual acuity of, 588 

 Muscles, extra-ocular, characteristics in 

 aniu-ans, 345 

 birds, 424, 425 

 fishes, 277, 278, 691 

 hammerhead shark, 327 

 lacertilians, 368 

 lamprey, 271 

 m.onotreines, 437 

 placentals, 494, 495 

 selachians, 290 

 teleosts, 312 

 See also under various }nuscles. 

 Mustela erminea. See Ermine. 



nivalis. See Weasel. 

 Mustelida?, 445 



lacrimal passages absent, 494 

 nictitating membrane, 493 

 pupils, 472 

 Alustelus, 285 



area centralis, 289 

 chromatophores, 96 

 pupils, 285, 286 

 tapetum, 283 

 visual cells, 288 

 antarcticus, pupil of, 286 

 My a arenaria, 131 



light -shadow reflex in, 574 

 ocelli of, 131, 200 

 visual pigment in, 120 

 Myelencephalon, 532 

 Myliobatis, 283 

 eyes, 281 

 pupils, 287 

 visual cells, 288 

 Myocastor coypus. See Coypu. 

 Myo-epithelial cells, 513, 514 

 Myogale. See Desman. 



S.O.- VOL. I. 



Myomorpha, 445 



See also Mouse, Kat, etc. 

 Myriapods, 210 



blind, 729 



eyes of, 151, 210 



luminous organs in, 740, 745 



neuro -endocrine system, 552 



vision of, 578 



visual centres, 524 

 Myrmecobiiis. See Ant-eater, banded. 

 MyrmecopJiaga. See Ant-eater, giant. 

 Mysids, 58 



telotaxis in, 58 

 Mystacoceti, 446 

 Mytilus, 200 



sense organs of, 200 

 Myxicola cesthetica, ocelli of, 191 

 Myxine gluiinosa, 114, 734 



degenerate eyes of, 734 



dermal sensitivity of, 114 



secretory mechanism of, 267 

 Myxinoids, degenerate eyes in, 734 



labyrinths, 534 



median eyes absent, 713 



See also Bdellostoma, Myxine. 

 Myzus, colour vision of, 587 



N 



Naja tripudians, 386 



fundus, PI. X 

 Narwhal, 446 

 Nasal asymmetry, 674 

 Nasua. See Coati. 

 Native cat. See Dasyure. 

 Natrix. See Tropidonotus. 

 Nautilus, 130 



ocellus of, 137, 201 

 Navigation by birds, 64 



pecten and, 416 

 Necrojjhorus, 219 



eyes of, 172 

 Necturus, 349 



eyes of, 349 



violet rods, 350 

 Nematodes, 187 



sense organs of, 190, 734 

 Nemertines, 187 



bioluminescence in, 739 



nervous system, 519 



sense organs of, 189 

 Nemestrinus, colour vision in, 635 



