INDEX 



787 



Bufo marinus, fundus, 341 

 iris, 337, PL III 



viridis, iris, 337 

 Bugula, 46 



phototaxis in, 46 



flabellata larva, ocelli, 195 



turrila larva, ocelli, 195 

 Bull. See Cattle. 

 Bullfinch. See Pyrrhula. 

 Burbot. See Lota. 

 Burrowing habit, degenerate eyes due to, 



728 

 Bursalis muscle, in birds, 424 



in lacertilians, 368 

 Bush -baby. See Galago. 

 Bush-cat {Felis libyca), ciliarv processes, 



466 

 Buteo, 417 



bifoveate retina, 417, 418 



summation, retinal, 660 



visual acuity of, 657 

 Butterflies, 219, 220 



aggregate eyes in, 159 



colour vision in, 587 



neu'.o -secretory cells, 555 



retinal pigment inigration in, 170 



visual acuity of, 588 



See also Vanessa, Pieris. 



Cahrita, eyelids, 366 

 Cacatua roseocapella, orbits, 425 

 Cacicus cela, iris, 407 

 Caddis-fiies, 219. 220 



larvae, ocelli, 222 



neuro -endocrine system, 555 

 C Cecilia, eyes, 730 

 Csecilians, 334 



pineal organ, 714 



retina, pure-rod, 610 



rudimentary eyes, 730 

 Caiman, 375 



iris, PL VIII 



visual field, binocular, 682 

 Calamokhthys, 278, 320 



eyes of, 320 



retina, pure-cone, 611 

 Calanus, 207 

 Caligus, 208 



eyes of, 209 

 Calliactis, nerve trunk, 516 



Callionymus, visual cells, 307 

 Calliphora, 219 



electroretinographic responses, 586 

 ocellus, 140 



optic ganglia, activity of, 524 

 vision of, 584 

 visual acuity of, 588 

 erythrocephala, maggot, 50 



phototaxis in, 47, 50 

 vomitoria, telotaxis in, 56 

 Calotermes flavicollis, lai'vas, phototaxis in, 

 43 

 telotaxis in, 56 

 Calypte, bifoveate retina, 418 

 Cambarus, eye-stalk, 523, 553 

 nervovis system, 522, 524 

 neuro -endocrine system, 553 

 retinal pigment, migration of, 19 

 ayersii, sensitivity of, 104, 114, 115, 



724 

 virilis, metabolic rhythm in, 16 

 photopigments in, 121 

 Camel (Camehis bactrianus), 446 

 corpora nigra, 469, 470 

 eyelids, 491 

 tactile vibrissse, 492 

 See also Tylopoda. 

 Campanula of Haller, in holosteans, 321, 

 647 

 in teleosts, 302, 646 

 Canal of Schlemm, 473 

 of Sondermann, 473 

 Canida>, 445 



ocular movements, 696 

 optic disc, 486 

 pupil, 471 



retinal vascularization, 479 

 See also Dog, Fox, etc. 

 Capra. See Goat. 

 Caprella, 207 



Caprimnlgus europceus, 410 

 fundus, 410, PL XII 

 pecten, 412 

 Capsule, lens, in jDlacentals, 474, 653 



variation in elasticity, 652 

 Capuchin monkey. See Monkey, 



capuchin. 

 Capybara, pupils, 472 

 Carassius atiratus, 292 

 double cones in, 308 

 iris, PL II 

 phototaxis in, 45 

 pigment epithelium, 305 



