INDEX AND GLOSSARY 



779 



Tarsius (mammal: a lemuroid) 

 color blindness of, 520 

 relationships of, 517 

 rotatability of head of, 213, 309 

 stenopaic pupil of, 162, 221, 228, 257, 273 

 tapetum lucidum (lacking) in, 241 

 tubular eyes of, 309, 677-678 

 immobility of, 213, 309 

 Tauredophidium (deep-sea teleost), vestigial 



eye of, 397 

 taxonomy: the Isranch of biology which deals 

 with the classification of organisms 

 in accordance with their evolution- 

 ary history and relationships 

 tears, properties of, 41, 678 

 tegmentum: a portion of the brain; 302*, 

 TeiideB (reptiles: a lizard family) [329 



ciliary muscle in, 624 

 spectacles in, 450 

 teleost fishes: Teleostei; 135, 137* 



eyes and vision of: sub-index, p. 573; 



575-588; 

 and: 



argentea of, 570 

 chorioid of, 651 

 ciliary folds in, 567 

 falciform process of, 653 

 retina in, 659 



tapetum lucidum in, 692 (entry for p. 

 vitreal vessels of, 652-653 [236) 



telescopic eyes: tubular eyes, q.v. 

 Telmatobius (amphibian: an anuran), com- 

 pletely aquatic habits of, 368 

 TelosauridcE (reptiles: extinct crocodilians), 



upward aim of eyes in, 274 

 ten-pounder: Elops, q.v. 

 Teratolepis (reptile: a spectacled gecko), 



pupil and visual cells of, 627 

 terns 



areae and foveae of, 187 

 feeding method of, 439 

 terrapins: amphibious chelonians, q.v. 

 terrestrial activity 



'adaptations' for, in elasmobranchs, 428- 



429 

 adnexal requirements for, 418, 592-593 

 dioptric requirements for, 417 

 eyes and vision in, 417-429 

 Testudo (reptile: a tortoise) 

 accommodation in, 437 

 binocular field of, 293-294 

 eye of, 609 

 lens of, 437, 620 

 scleral ossicles of, 274 

 sexual difference in eye color of, 550 

 transversalis muscle (lacking) in, 437 

 Tetragonopterus (teleost: tetra), bony sclera 

 of, 381, 578 



Tetrodon (teleost: a globefish), fovea of, 



304 

 thalamus: portion of the brain alongside the 



third ventricle 

 Thalassochelys (reptile: a sea-turde), an- 

 terior segment in, 437 

 Thamnophis (reptile: garter snake) 

 abrasion of spectacle in, 456-457 

 visual fields of, 294 

 Thelotornis (reptile: a colubrid; African 

 bird-snake) 

 accommodation in, 283 

 binocular vision in, 283, 307 

 fovea in, 186-187, 299, 307 

 pupil of, 186, 221, 299 

 relationships of, 299 

 Therapsida (extinrt reptiles ancestral to mam- 

 mals), 135; cones and color vision 

 in, 519-520 

 thermocline: an intermediate layer of water 

 in lakes, within which the temper- 

 ature changes regularly with depth 

 Thieulin, 298 



third dimension, perception of (see bathop- 

 sis, stereopsis), 313* 

 motion pictures with, 361 

 Thompson, A., 296, 550 

 Thompson, D., 528 



Thoracochorax (teleost: a characin; hatchet- 

 fish), 'flight' of, 431 

 threshold of stimulation, 65, 69* 



by moving objects, 347 

 throat-fan, 525 



Thunnida (teleosts: tuna family) 

 guanin in retina of, 585 

 visual cells in, 586 

 Thunnus (teleost: tuna) 



coloration and habits of, 528 

 scleral ossicles of, 271, 380-381 

 Thylacinus (mammal: marsupial 'wolf), 



tapetum lucidum of, 241, 672 

 Tierra del f^uego, visual acuity in natives of, 

 tiger (a felid) [190 



outer nuclear layer of, 217 

 protective coloration of, 523 

 taxonomic position of, 139 

 Tiliqua (reptile: a scincid lizard) 

 lid window of, 450 

 visual fields of, 294 

 tinamou 



flying capacity of, 648 

 pecten in, 649 

 taxonomic position of, 650 

 Tinea (teleost: a cyprinid; tench), cone- 

 concentration in, 176 

 toadfish: Opsanus, q.v. 

 toads: Anura (in part), q.v. 

 toddy cat: Paradoxurus, q.v. 



