INDEX 



837 



Tactile sense, in myriapods, 578 

 Pecten, 103 ' 

 spiders, 579 

 vertebrates, 597 

 worms, 572 

 spatial judgment and, 667 

 vibrissse, of camel, 492 

 of cat, 492, 601 

 rodents, 601 

 Taenia, 187 

 Talitrus saltator, 61 



luminous bacteria in, 738 

 menotaxis in. 61, 62 

 orientation to polarized light in, 73 

 time -memory in, 22 

 Talpa. See Mole. 

 Tapetal pigment, migration of, 19 

 Tapetum (lucidum), in compound eyes, 

 165, 168 

 in crustaceans, 165 

 insects, 168 

 in simple eyes, 147 



in arachnids, 149, 150 

 crustaceans, 152 

 molluscs, 148 

 in vertebrate eyes, 606 

 cellulosum, 609 



in placentals, 459 

 choroidal, non-occlusible, 608 

 in chondrosteans, 317 

 Latimeria, 315 

 occkisible, 612 

 in selachians, 281 

 fibrosum, 609 



in marsupials, 438 

 placentals, 457 

 teleosts, 297 

 retinal, non-occlusible, 608 

 in chondrosteans, 318 

 crocodilians, 377 

 deep-sea teleosts, 305 

 Didelphys, 440 

 Fteropus, 459 

 occlusible, 612 

 in teleosts, 305 

 Tapir, 444, 446 

 optic axis, 688 

 retinal vascularization, 480 

 Tarbophis, retinal vascularization, 301, 

 390 

 visual cells, 392 



field, binocular, 684 

 Tarentola, melanophores of, 87 



Tarsal glands, in mammals, 491 

 Tarsier, 442, 443, 613 

 area centralis, 485 

 eyes, shape of, 448 

 fovea, pure-rod, 486 

 immobility of eyes, 696, 697 

 pupils, 612, 613 

 retina, pure-rod, 482, 610 

 threshold to light, 674 

 Tasmanian devil, 437, 438 

 fvmdus, PI. XIII 

 tapetum fibrosum, 438, 609 

 wolf, tapetum fibrosum, 438, 609 

 Taste receptors, in bees, 588 

 insects, 581 

 vertebrates, 534 

 Tauredophidium, degenerate eyes in, 724 

 Tautoga onitis, visual pigments in, 121 

 Tealia, phototactic reactions of, 571 

 Tectum, 534, 690 

 in birds, 535 



cyclostomes, 534 

 fishes, 534 

 mammals, 536 

 Tegenaria domestica, 214 

 ej-es of, 159, 213 



anterior median, 140 

 Tegmentum, 535, 690 

 Telencephalon, 532, 542 



development of, 542 

 Teleosteans, 235, 279 



accommodation in, 645, 646 

 archicortex, 543 

 blind, 724 



central nervous system, 532 

 ciliary ganglion, 501 

 colour changes in, 84, 91, 96, 621 

 control of, 558 

 pineal body and, 92 

 vision in, 621, 624 

 diurnality of, 603 

 electric organs in, 751 

 eyes of, 291 jg^., 293 



degenerate, 724, 725, 735 

 irides, PI. II 

 iris furrow, 337 

 lateral geniculate body, 541 

 luminous organs, 741 

 migration of retinal pigment, 614 



of visual cells, 614 

 neuro -secretory cells, 551 

 olfaction in, 598 

 pineal apparatus, 713 



