INDEX AND GLOSSARY 



773 



ossicular ring in 



oligomeric (i.e., with few units), of 

 fishes, 271, 274, 380-381, 578- 

 579, 586 

 polymeric (i.e., with many units), of 

 sauropsidans, 270-271, 274-276, 

 275, 280, 381, 437, 441, 609, 

 617-618, 623, 632, 642-645, 

 666, 681 

 thickenings of, 441, 445-446, 563-566, 

 627, 678 

 eye size and, 415-417, 569-570 

 visibility in lid opening of 

 in mammals in general, 311 

 in sirenians, 408 

 taxonomically: 

 lampreys, 556-557 

 elasmobranchs, 564-566, 563 

 sturgeons, 569-570 

 holosteans, 574 

 teleosts, 578-579 

 dipnoans, 590 



amphibians, 594-595, 601-602, 606 

 chelonians, 609 

 crocodilians, 613 

 Sphenodon, 617 

 lizards, 623 

 snakes, 627-629 

 birds, 642-644 

 monotremes, 666 

 marsupials, 671-672 

 placentals, 677-678 

 whales, 415-417 

 man, 7-9, 8 

 Scomber (teleost: mackerel) 



falciform process, campanula, in, 583 

 head and adipose lids of, 382 

 scombroids: mackerels etc. 

 adipose lids of, 382-383 

 guanin in retinae of, 585 

 visual cells in, 586 

 Scopelus: Myctophum (q.y.), in part; 405 

 Scophthalmus (teleost: a flatfish; turbot), 

 eye and pupillary operculum of, 

 ScoTpana (teleost: scorpionfish ) [158 



stripes crossing eye in, 546 

 visual cells in, 586-587 

 scotocyte, 53* 



scotoma: an area of invisibility within the 

 central, 97 [visual field 



perception of motion in, 343 

 physiological, 178-179*, 179-180 

 filling-in of, 332 



movement-perception and, 366-367 

 multiple, 367 

 scup: Stenotomus, q.v. 

 Scylliorhinus (elasmobranch: spotted dog- 

 habits of, 222, 429 [fish) 



lids and photophobia in, 429 

 loss of optic pedicel by, 564 

 pupil of, 222, 224-225, 228, 256, 273 

 sea-horse: Hippocampus, q.v. 

 sea-lions: eared seals; Otariidae; eyes of, 



445-446 

 sea-snakes: Hydrophiini, q.v. 

 seals (-(- walrusses = Pinnipedia, q.v.) 

 Sebastodes (teleost: rockfish), visual cells 

 Secerov, 526 [of, 586 



Selache (elasmobranch: basking shark) 

 habits of, 222, 243 

 pupil of, 220, 222 



tapetum lucidum (lacking) in, 240, 243, 

 thick sclera of, 569 [568 



sensitivity (see also nocturnality, adaptations 

 for), 65* 

 adaptations in deep-sea fishes for, 395-407 

 apparently unnecessary, of seals, 446-448 

 factors in, 65 



retinal, 53, 68-71 

 nocturnality and, 206 

 ocular proportions and, 210-214 

 summation and, 65, 69 

 time in darkness and, 71, 73 

 Selachii (elasmobranchs: sharks -i- batoids, 



qq.v.), 135-136* 

 Semotilus (teleost: a cyprinid; dace), color 



vision of, 473, 486 

 Sepedon (reptile: a spitting cobra), visual 



cells of, 178, 637-638 

 Seps (reptile: a scincid lizard), ciliary 



muscle of, 619, 624 

 SerranidcB (teleosts: true [sea-] bass family), 



side-resting habit in, 385 

 S err anus (teleost: sea-bass) 

 aphakic space in, 261 

 binocular field in, 292 

 eye in, 185, 261 

 fovea in, 185, 304 

 optic nerve in, 261 

 sessile: said of organisms which live attached 

 Seton, 246 [to a substrate 



Seymouria, 607* 

 Sgonina, 512, 517 

 shad: Alosa, q.v. 



sharks: selachian elasmobranchs, except rays 

 accommodation and refraction in, 251, 259- 

 260, le-y-iei, 272-273, 381, 429 

 area centralis in, 184-185, 187, 243, 245 

 chorioid in, 243-244, 566 

 ciliary body in, 262, 372, 567 

 cornea in, 566 



dermal color changes in, 537 

 distribution of, 563 

 eye in, 259 



shape of, 380, 565 

 size of, 386, 563 



