INDEX 



823 



Pernis apivorus, iris, 408 

 Persistence -time of vision, 705 

 Petaurus. See Flying phalanger. 

 Petrogale. See Wallaby. 

 Pefromyzon 7)iarinns, 260, 716 

 brain, 533 

 eyes of, 265 _ff. 

 larva. See Ammocoetes. 

 uveal tract, 266 

 visual cells, 269 

 See also Cyclostomes. 

 Phseommatin, 123 

 Phalacrocorax, 404 



accommodation in, 652. 655 

 annular pad, 409 

 ciliary muscle, 407 

 harderian gland, 425 

 iris, 407 

 lens, 409 

 ^ ocular movements of. 696 

 scleral ossicles, 404 

 sphincter muscle, 407 

 bougainvillii, iris, 407 

 Phalanger, 437 



fij'ing. See Flying phalanger. 

 spotted (cuscus), 438 

 vulpine. See Opossum, Australian. 

 Phalangeridte, 437 

 Phalangida, 215 

 Phalaris canariensis (grass), phototropism 



in, 40 

 Phascolarctin;p. 437 



See also Koala. 

 Phascolomyinse, 437 

 See also Wombat. 

 Phengodes, hnninescence of, 739 

 Philatithus triangulinn, mnemotaxis in, 78, 



79 

 Phobotaxis, 31 

 Phoca. See Seal. 

 Phoccena. See Porpoise. 

 Phocidse, 445 



accommodation in. 641 



cornea, keratinized, 456 



eye of, 449 



lens, 474 



ocular adnexa, 501 



optic axis, 688 



disc, 486 

 pupil, 470, 641, 655 

 refraction of, 639 

 retina, pure-rod, 610 

 Phoenicopterus, 407 



Phoenicopterus 

 retina, 419 

 ruber, iris, 407 

 Pholas, bioluminescence in, 736, 740, 745, 

 748 

 ocelli of. 200 

 visual pigment in, 120 

 Pholidota, 445 

 Pholis, fovea, 310 

 Phosphorescence, 747 

 Photinus, 219 



bioluminescence in, 742, 749 



rhythmic, 22, 747 

 vision of, 585 

 pyralis, bioluminescence in, 740 

 telotaxis in, 58 

 Photoblepharon, luminous organ in, 737, 



738 

 Photocytes, 251 

 Photoglyctemic reflex, 560 

 Photokinesis. 31, 32. 33 

 Photo-mechanical changes in retina. 614, 



615 

 Photoperiodism, 7 

 in animals, 13 



bioluminescence and. 21, 747 

 blood constituents and, 13 

 centres controlling, 14, 550 

 general activity and, 15 

 light sensitivity and, 559 

 metabolism and, 13, 555, 556. 560 

 mitosis and, 13 

 ocular tension and, 14, 560 

 pigment migration and, 19, 554, 



556, 558 

 sexual cycle and, 16. 555, 556, 559 

 temperature and, 13 

 lu'inary output and. 13 

 in plants, 9 

 Photophores, 746 

 Photopigments. .See Pigments. 

 Photoseixsitivity, 4. 113 

 diencephalon and, 537 

 Photostasis, 544 

 PJwtostomkis guernei, luminous organs in, 



743 

 Photosynthesis, 4 

 Phototaxis, 31. 32, 42 



types of, 47 

 Phototropism, 31. 32, 38 

 in animals, 39 

 in plants, 38, 40 



