INDEX AND GLOSSARY 



771 



retinal image 



barrel distortion of, 354 



enlargement of, 66 



by foveal clivus, 183-184 



by optical employment of cornea, 417 



as formed by pinholes, 224 



'growth' of, 344 



illumination of, 211-212, 224, 245, 448, 



keystoning of, 317 [652 



motion of, 347-352 



peripheral vs central, 352-356 



persistence-time of, 349-365, 350* 

 and grades of movement, 351 



size of, 66, 171-175, 210-212, 245, 620, 

 retinal rivalry, 3 1 6* , 3 3 2-3 3 3 [642 



Revesz, 499 

 Reynolds, 509 

 Rhamdid (teleost: a cave catfish), retention 



of good eyes by, 387, 390 

 Rhea (bird: American 'ostrich') 



pecten of, 649, 656 



ringwulst of, 648 

 rhesus monkey: a macaque, q.v. 



color vision of, 515 



visual acuity of, 207 

 Rhineodon (elasmobranch: whale shark), 



thick sclera of, 569 

 Rhinoceros 



avascular retina of, 51, 201 



false blink of, 427 



nictitating membrane of, 426 



taxonomic position of, 676 



weak tapetum lucidum of, 241 

 Rhinocheilus (reptile: a colubrid snake) 



basis of sensitivity in, 168 



visual cells of, 63, 168, 638 

 Rhinophis (reptile: a uropeltid snake) 



apertured spectacle of young, 455 



glandular adnexa in, 424 

 Rhodophyceae (red algce), photochemical 



adaptation to deep water in, 374 

 rhodopsin, 74-76* 



absorption spectrum of, 101, 373-375, 462 



derivatives of, 464 



direct observation of, 103 



distribution of, 691 (Plate I) 



invention of 

 original, 163 

 other, 63, 165, 168, 375, 465, 518 



in nocturnal forms, 206 



ophthalmoscopic visibility of, 231 



properties of, 53, 74-79, 462 



relation of 



to pupil, 155, 157 



to scotopic brightness, 92, 101 



role of, in dark-adaptation, 76-80, 155 



sensitivity and, 70-71 



solvents and tests for, 75, 100 



TAXONOMICALLY: 



lampreys, 562 

 chelonians, 611-612 

 crocodilians, 611, 616 

 geckoes, 63 

 snakes, 636, 638 



absence from double rods of, 63 

 birds, 661 

 Rhomboidichthys (teleost: a pleuronectid ) , 



dermal color changes of, 482 

 Rhombus (teleost: a pleuronectid), dermal 



color changes of, 482 

 Rhynchocephalia (order of reptiles; see 



Sphenodon, Pteurosaurus) , 135, 

 rhythms, diurnal, 538 [ 138, 622 



Riley, 499 



river snakes: Homalopsinse, q.v. 

 robin: Turdus, q.v. 



Rochon-Duvigneaud, 216, 246, 292, 306- 

 307, 312, 661, 692 (entries for 

 pp. 568, 589 

 Rodentia (order of mammals) 

 aquatic, 443 

 area centralis in, 187 

 ciliary processes in, 681 

 color vision in, 508-515 

 conus papillaris in, 654 

 eyes of, 680 



size of, 677 

 eyeshine and tapetum lucidum in, 230, 241 

 habits of, 170, 201, 209, 443, 508, 692 

 lens in [ (entry for p. 201 ) 



coloration of, 201 

 shape of, 213, 683-684 

 niaitating membrane in, 426 

 ocular glands of, 426 

 optic axes of, 297 

 pupils of, 221, 227 

 retinal circulation in, 201, 684 

 taxonomic position of, 139, 676 

 visual cells of, 216, 685 

 visual fields of, 296-297, 310 

 Rotscheu, 476* 

 Roth, 510 

 rugose: set with ridges or with wrinkles 



which cannot be 'smoothed out' 

 Rutilus (teleost: a cyprinid) 

 double (?) cones of, 586 

 retinal tapetum lucidum of, 586, 692 

 (entry for p. 236) 

 Rynchops (bird: black skimmer), 692 (en- 

 try for p. 221); unique slit pupil 

 of, 221, 226 



saccadic eye-movements (see eye-movements) 

 Saccopharynx (deep-sea teleost), vestigial 

 Sachs, E., 100, 348 [eye of, 398 



