INDEX 



813 



Loligo 



luminous bacteria in, 737 

 pealii, visual pigment in, 120 

 'oulgaris, 202 

 Lophortyx calif ornicus, 417 



retina, 417 

 Loris, slender {Loris gracilis), 443 

 tapetum cellulosum, 459 

 visual cells, 482 

 slow (Nycticebus), 443 

 pvipils, 472 

 shape of eye, 448 

 tapetum cellulosum, 459 

 See also Lemuroids, Primates. 

 Lota, retina, rod -rich, 610 

 Loxia, choroid, 404 

 Loxodonta africana. See Elephant, 



African. 

 Luciferase, 736, 748 

 Luciferin, 736, 748 

 Lucifuga, degenerate eyes in, 725 

 Lucioperca, migration of rods and cones in, 



614 

 Lumbriculus, conditioning of, 573 

 Lumbricus terrestris, 190 



cerebral ganglion, removal of, 520 

 conditioning of, 573 

 light-sense of, 572 

 metabolic rhythm in, 16 

 nervous system, 519 

 ocelli of, 128, 131, 190 

 reactions to light, 53, 520 

 tropotaxis in, 53 

 visual pigment in, 120 

 Luminosity-curve, in insects, 585 

 Luminous bacteria, 737 

 fungi, 737 

 organs, 736 



in arthropods, 740 

 coelenterates, 739 

 echinoderms, 739 

 fishes, 737, 741 

 molluscs, 740 

 protochordates, 740 

 worms, 739 

 protozoa, 738 

 Lung-fishes. See Dipnoans. 

 Lutianus, colour preference in, 624 

 Lutra. See Otter. 

 Lutreola. See Mink. 

 Lycosa agricola, 214 

 eyes of, 213 



Lycoteuthis diadema, 740 



luminous organs in, 740 

 Lygodactylus, lens, 361 

 Lymantria, larvae, form vision in, 582 



menotaxis in, 61 

 Lynx (Felis lynx), 444, 445 



eye of, 447, 605 



See also Felidse, Carnivores. 

 Lytechinus, protection from light in, 39 



M 



Mabuya, transparent eyelids in, 367 

 Macaca {Macacus). See ]\Ionkey, 

 macaque. 



pileata. See Monkey, toque. 



rhesus. See Monkey, rhesus. 

 Mackerels. See Scombrid*. 

 Macrobrachium, retinal pigment, migration 



of, 19 

 Macrogenitosoma prsecox, 719 

 Macroglossa, colour vision in, 587, 588 

 Macronectes giganteus, fovea and infula, 



418 

 Macropodidse, 437 



See also Kangaroo, Wallaby. 

 Macropus. See Kangaroo. 

 Macroscelidee, 441 

 Macula, xanthophyll in, 122 



yellow pigment of, 122, 656 



See also Retma, Fovea, Area centralis. 

 Maggots, inactivation by light, 7, 34 



klinotaxis in, 50, 51 



ocelli of, 137, 139 

 Magpie, 403 



shape of eye, 402 

 Malacocephalus Icevis, bioluminescence in, 



742, 746 

 Malacostraca, 206 



Malopterurus, electric organ of, 751 

 Malpolon, visual field, binocular, 684 

 Mammals, 429 



accommodation in, 652, 653 



angle gamma in, 676, 677 



brain, 533 



transection of, 534 



central nervous system, 532 



cerebral cortex, 543 

 removal of, 545 



ciliary ganglion, 501 



