INDEX 



811 



Lanius, 662 



visual acuity, 662 

 Lankester, Edwin Ray, 232, 233 

 Lantern flies, luminous organs in, 740 

 Lanthanotus, eyelids, 366 

 Laridae. See Gulls. 

 Larus argentatus, pecten, 413, 414 



visual responses, 665 

 Lasius, scototaxis in, 60 



niger, menotaxis in, 69 

 Lateral geniculate body. See Geniculate 

 body. 



line organs, 534, 690 

 Latimeria, 235, 278, 315 



eyes of, 314, 316 

 Latrodectus, 84 



colour changes in, 84 

 Laurence-Moon-Biedl syndrome, 559 

 Leander, 578 



colour vision in, 578 



pigments in, 123 



retinal, migration of, 554 



reproduction, control of, 555 

 Lehistes reticulatus, area centralis, 309 



colour changes in, 96, 97 



migration of rods and cones, 614 

 Leeches, 190 



colour changes in, 93 



light-shadow reflex in, 573 



ocelH, 131, 133 



See also Hirudo, Hcemadipsa, etc. 

 Lemniscus, lateral, 536 

 Lemur catta, area centralis, 485 

 tapetum cellulosum, 459 



macaco, area centralis, 485 



mongoz, colour blindness of, 635 

 Lemuroidea, 443 



See also Lemurs, Loris, Galago, etc. 

 Lemuroids, nocturnal, 443 

 retina, pure-rod, 610 

 shape of eye, 448 

 tapetum cellulosum, 459, 609 

 visual cells, 482 

 See also Galago, Loris, etc. 

 Lemurs (true), 442, 443 



angle gamma, 677 



area centralis, 485 



colour blindness of, 635 



eye of, 605 



flying. See Flying lemur. 



optic axis, 688 

 Lens (crystalline), characteristics in 

 Anableps, 324 



Lens (crystalline), characteristics in 

 anurans, 340 

 birds, 408, 409 

 cephalopods, 144, 145 

 chelonians, 372 

 coelacanth, 315 

 crocodilians, 377 

 fishes, 276 



tubular-eyed, 323 

 invertebrate compound eyes. See 

 Crystalline cone, 

 simple eyes, 125, 127, 129 

 lacertilians, 360, 361 

 lamprey, 267 

 marsupials, 439 

 monotremes, 436 

 placentals, 474 

 selachians, 287 

 snakes, 388 

 Sphenodon, 381 

 teleosts, 304 

 urodeles. 347 

 cuticular, 136, 138, 139, 140, 143 

 deformation of, in accommodation, 649 

 movement of, in accommodation, 644 

 backward, 644 

 forward, 647 

 spherical, occurrence of, 606 

 vertebrate, origin of, 246 

 yellow, occurrence of, 656 

 Lentiform body of teleosteans, 299 

 Leopard (Felis pardus), 445 

 eyelids, 491 

 pupils, 471 



See also Felidae, Carnivores. 

 Lepadogaster, ocular movements, 693 

 Lepas, 208, 209 



adult, degenerate eyes, 722 

 larva, eyes of, 209 

 Lepidoptera, 219, 220 



larvae of. See Caterpillar. 

 See also Butterflies, Moths. 

 Lepidosiren, 312 

 eyes of, 312 

 forebrain, 239 

 retina, pure-rod, 610 

 Lepidosteus, 279, 321 



eyes of. 321 

 Lepisma, 218 



circus movements in, 54 

 scototaxis in, 60 

 Lepomis, hue discrimination in, 626 

 threshold to light, difference, 617 



