INDEX AND GLOSSARY 



interpupillary distance of, 327 



lashes (lacking) in, 426 



lid movements of, 425 



optic axes in, 297 



tapetum lucidum of, 145, 233, 241 



taxonomic position of, 139, 676 



thick sclera in, 415 

 Eliomys (mammal: a dormouse), retinal 



circulation in, 201 

 elk, taxonomic position of, 139 

 ellipsoidality (ellipticity) of eyeball 



and barrel distortion, 354 



and lid-opening, 428 



and streamlining, 380-381 



taxonomically: 



elasmobranchs, 565, 569 



sturgeons, 569 



holosteans, 574 



teleosts, 578 



birds, 643 



mammals, 677 

 seals, 445 

 sirenians, 409 

 toothed whales, 414 

 Ellohius (mammal: a mole-rat), eyes of, 677 

 Elritz, Ellritz: Phoxinus, q.v. 

 ElopidcB (teleosts: ten-pounder family) 



guanin in retina in, 585 



visual-cell bundles in, 588 

 Elops (teleost: ten-pounder) 



adipose lids of, 383 



leptocephalus stage of, 406 

 embryology: development, q.v. 

 embryonic fissure (see optic cup) 

 emmetropia, 27, 35-36*, 249*, 252-253, 

 emu: Dromceus, q.v. [288, 407 



Emyda (reptile: a terrapin), lid window in, 

 Emys (reptile: a terrapin) [450,457-458 



accommodation in, 437 



anterior segment of, 277 



behavior of, 494 



circulatory pattern of eye in, 611 



scleral ossicles of, 274 

 Encheliophis (teleost: pearl-fish) 



dorsal aim of eyes in, 160, 391 



habits of, 391 



pinhole pupil of, 160, 220, 222, 228, 257, 



tendinous sclera of, 578 [273, 391 



endoderm: innermost of the three germinal 

 cell-layers of an embryo (see eao- 

 derm, mesoderm) 

 English sparrow: Passer, q.v. 

 Engraulis (teleost: an anchovy), eye and 



tertiary speaacle of, 454, 460 

 entoparasite : an internal parasite 

 Entosphenus (cyclostome: a lamprey) 



chorioid of, 558 



size of eye in, 556 



visual cells of, 560-561 

 Eosuchia (extinct reptiles) 



eyes of, 622 



taxonomic position of, 135 



visual cells of, 621, 637, 691 

 ependyma, 127*, 127 



in Amphioxus, 128 



in lampreys, 128 



in optic nerve, 559-560, 569, 591, 632 



origin of visual cells from, 126, 127-129 



vacuolated, 573 

 EpicTdtes (reptile: a boa) 



canal of Schlemm in, 629-630 



ciliary body of, 629 



sclera of, 627 



zonule fibers of, 631 

 Epigonus (deep-sea teleost), enlarged eyes 



of, 395 

 Epinephelus (teleost: grouper), dermal color 



changes of, 528 

 epithelium: a sheet or pavement of cells of 

 either ectodermal or endodermal 

 origin (cf. mesothelium) 

 Epomophorus (mammal: a fruit-bat), retinal 



tapetum lucidum of, 684 

 Eptatretus (cyclostome: a hag), eye of, 562 

 Eremias (reptile: a lacertid lizard), lid win- 

 Erhard, 501 [dow of, 450 



Erickson, 93 

 Erinaceus (mammal: hedgehog) 



color vision in, 517 



Meibomian glands of, 665 



retina of, 216, 685 



taxonomic position of, 676 

 erythrophores, 526* 

 Eryx (reptile: sand boa) 



canal of Schlemm (lacking) in, 629 



fibrous tunic of, 628 



lens of, 630 

 Esox (teleost: pike) 



binocular field of, 292 



cornea of, 579 



Descemet layers of, 580 



yellow coloration of, 191, 200, 202 



dermal pigments, effect of light on devel- 



habits of, 200 [opment of, 534 



optic nerve and disc of, 179 



retina of, 200, 433 



horizontal cells of, 585 



scleral cartilage and ossicles of, 380 

 essence d'orient, 235* 

 Etmopterus (elasmobranch: luminous shark) 



depth of swimming in, 392, 416 



eye size in, 416, 563 



lens of, 563 



luminous organ of, 402 



pupil of, 222, 398 



retina and visual cells of, 399-400, 568 



