828 



INDEX 



Purkinje shift, in birds, 629 

 crocodilians, 628 

 fishes, 625 

 frogs, 627, 628 

 insects, 586 

 Pycnogonida, 217 

 Pygopus lepidopus, conus, 363 



fundus, 362 

 PyramidaUs muscle, in birds, 424 

 chelonians, 374 

 crocodiUans, 378 

 Pyrophorus, luminescence in, 748 

 Pyrosoma, luminescence in, 740, 745 

 Pyrrhula, ciliary venous sinvis, 408 



lens, 409 

 Python, ciliary venous sinvis, 386 

 iris, 386 



pupillary contraction, 388 

 sclera, 385 

 molurus, fundus, 390 

 regius, iris, PL IX 

 reticulatus, iris, PI. IX 

 See also Spilotes. 



Q 



Quadratus muscle. See Bursalis. 

 Quadrigeminal body, 534 



R 



Rabbit, 445 



angle gamma of, 676 

 anterior chamber, 465 

 area centralis, 485 

 blood supply to eye, 498, 499, 500 

 cerebral cortex, 543 

 removal of, 545 

 ciliary ganglion, 501 



region, 461, 462 

 colour blindness of, 633 

 conjunctiva, 491 

 cornea, 453 



epithelium of, 452 



nerves of, 454, 455 

 drainage channels, 473 

 gonadotrophic hormone, control of, 559 

 iris vascularization, 468 

 lacrimal passages, 494 

 lens capsule, 653 



sutures, 474, 475 



Rabbit, Moll's glands lacking, 492 

 movement, perception of, 705 

 nictitating membrane, 493 

 ocular movements, 692 

 optic nerve -head, 488 

 orbit, 497 



pectinate ligament, 464 

 refraction of, 639 

 retina, 481, 484, 485 



vascularization of, 477, 478, 480 

 urinary secretion, 560 

 visual field, binocular, 673, 686, 687 

 vitreous, 476 

 Raccoon, 444, 445 

 colour vision of, 634 

 fundus, PI. XIV 



threshold to light, difference, 618 

 Radiolaria, 179, 180 



luminescence in, 738, 748 

 Radio -receptors, 116 

 Raja, 287 



accommodation in, 647 

 colour changes in, 95 

 ramp -retina, 642, 643 

 batis, pupils, 287 

 clavata, 280 

 eye of, 275 

 pupils, 287 

 miraletus, visual cells, 288 

 montagui, 280 

 Ramp-retina, 642, 643 

 Rana, 334, 335, 342 

 area centralis, 344 

 brain, 533 

 colour changes, 98 

 eye of, 334, 336 

 fundus, 341 



hue discrimination, 627 

 pineal organ, 714 

 pupils, 339 

 Purkinje shift, 628 

 visual cells, 342 

 cateshiana, iris, 337 



pupils, 339 

 clamata, phototaxis and temperature, 



627 

 esculenta, area centralis, 344 



iris, 337 

 halecina, pupils, 339 

 pipiens, visual cells, 250, 344 

 sphenocephala, iris, 371 

 temporaria, fundus, PI. Ill 

 iris, PI. Ill 



