INDEX AND GLOSSARY 



749 



hummingbirds 



ares and fovea of, 187-188, 307 

 eye size in, 641 

 fundus and pecten of, 188 

 sensitivity to red of, 503-504 

 "von Husen, 658 



Huso (chondrostean: a sturgeon), 136 

 Huxley, 139 

 hycEna (mammal: a canid), behavior of 



pupil in, 156 

 hyaloid vessels: vitreal vessels (^.v.; and 



see footnote, p. 575) 

 Hyborhynchus (teleost: a cyprinid), color 



vision of, 486 

 Hydrochcerus (mammal: capybara; largest 



rodent), pupil of, 221 

 Hydromantes (amphibian: a salamander), 

 complete terrestrial ity and vivi- 

 parity of, 368 

 Hydrophiinae (reptiles: sea-snake sub-family 

 of Elapidae) 

 accommodation and refraction in, 272-273 

 pupil in, 221, 228, 257, 272-273, 438, 

 Hyla (amphibian: a hylid anuran) [447 

 area centralis in, 305 

 complete terrestriality in, 368 

 dermal coFor changes in, 536 

 rhomboid pupil in, 223 

 HylidcB (amphibians: common tree-toad 

 family) 

 habits of, 368, 418 

 pupils of, 223-224 

 scleral cartilage in, 595 

 visual cells in, 598-599 

 Hymenal aimus (bird: New Zealand blue 

 duck), frontality and binocular 

 fixation of, 295 

 HynobiidaB (amphibians: a urodele family) 

 relationships of, 600-601 

 sclera in, 601 

 hypermetropia, 27*, 27, 252-253 

 distribution of, in animals, 273 

 Hyperolius (amphibian: an anuran), pupil 

 pupil of, 223, 692 (entry for p. 

 223) 

 Hypogeophis (amphibian: a caecilian), eye 



of, 605-606 

 Hypopachus (amphibian: an anuran) 

 scleral bone in, 274, 595 

 vertical pupil in, 223 

 Hypsiglena (reptile: a colubrid snake) 

 fibrous tunic of, 628 

 visual cells of, 63, 216, 638-639 

 rhodopsin (lacking) in, 168 

 Hypsignathus (mammal: a fruit-bat), ret- 

 inal tapetum lucidum of, 684 

 Hypsiprymnus (mammal: a kangaroo), 

 conus papillaris of, 672 



Hyracoidea (mammals: hyraxes or conies), 

 taxonomic position of, 676 



hyrax: Procaria, q.v. 



Hystricidae (mammals: a rodent family), 

 eyeshine and possible tapetum 

 lucidum in, 230, 241 



I 



Ichthyococcus (deep-sea teleost), develop- 

 ment of tubular eye in, 400 

 Ichthyomyzon (cyclostome: a lamprey) 



size of eye in, 556 



visual cells of, 560-561 

 Ichthyophis (amphibian: a caecilian), eye 



of, 605-606 

 Ichthyopsida : cyclostomes -I- fishes -i- am- 

 phibians 

 Idiacanthus (deep-sea teleost), adult and 



stalked larval eyes of, 403-405, 404 

 Iguana (reptile: an iguanid lizard) 



lens of, 620 



ocular proportions in, 617 



retina of, 625 



visual fields in, 294 

 Iguanidas (reptiles: a lizard family) 



dermal color changes in, 538-542 



eye-movements in, 538-542 

 illicium, 548* 

 lUysiidae (reptiles: a primitive snake family) 



habits of, 201 



pupils of, 220 

 Impennes: penguins, q.v. 

 India, visual acuity among natives of, 190 

 Indrt (mammal: a lemurid), 692 (entries 

 for pp. 221, 228) 



diurnality of, 228, 515 



iris color in young and adult of, 550 



pupil of, 221 

 Indris, black: Indri, q.v. 

 Indrisinas (mammals: a lemurid sub-family), 



diurnality in, 515 

 induction, 499* (see after-image, color- 

 contrast ) 

 Insectivora (order of mammals: moles, 



aquatic, 443 [shrews, etc.) 



binocularity of, 310 



as 'bottle-neck' forms, 284, 520, 675, 687- 

 689 



color vision in, 517 



habits of, 201 



nictitating membrane in, 426 



optic axes of, 297 



primitive, eyes of, 687 



pupils of, 221 



relationships of, 135, 139, 504, 517, 675- 



size of eye in, 677 [676 



upward tilt of eyes in, 296 



visual cells of, 685 



