510 INDEX 



Arachnida, 



affinities of, 135 



eyes of, 123, 470 

 Argulus foliaceus, 469 

 Argyropelecus, 220 



Armadillo, multiple primitive streaks of, 38 

 Armour plating of Cephalaspid fishes, 474 

 Area barbata, 



Noce, 356 



section of eye of, 58, 379 

 Artery(ies), 



posterior cerebral, 410 



posterior choroidal, 410 

 Arthrodira, 181, 344 

 Arthropoda, 



eyes of, 103, 169 



median and lateral eyes of, 358 

 Ass, pigment in pineal organ of, 63 

 Ascidia mammillata, 168 



larva of, 5, 175 

 Astacus fluviatilis 



development of eyes, 112 



eye of, 16, 369 

 Asteroid, position of optic cushions, 193 

 Asterolepis ornata, 472 

 Astroblast, 382 

 Astrocytes, 319, 381 



fibrous, 384, 386 



fixed, vascular, 381 



protoplasmic, 386 



subpial, 381 

 Ataxia, 449, 458 

 Ataxic gait, 438 

 Atrium, of parietal sense-organ, 69, 190, 



197 

 Auchenaspis, 191, 359 

 Aurelia aurita, ocelli of, 81 

 Avertin, rectal, 441 

 Axial foramen, 472 

 Axis cylinder (Axon), 407 

 Axolotl, 224 

 Axons of, 



retinal cells, decussation of, 166 



sensory epithelial cells, 17 



Bacillary layer, of retinal cells, 161 

 Balanoglossus, 169 



dorsal and ventral nerve-cords, 170 



larva of, 170, 172 

 Basement membrane, 16, 52, 65, 118, 119, 



133 



Bdellostoma, 187, 198 

 Belemnites, 354 

 Belone acus, 217, 220 

 Bilateral 



end vesicle in cartilaginous fishes, 207 



eye of ascidian larva;, 175 



origin of median organs, 187, 327 



pineal organs of Anua, 213, 214, 215 

 Bilateral parietal foramina, 



of Acanthias, 208 



of fossil fishes, 208, 327 

 Birds, 



pigmentation of pineal region of, 75 



pineal system of, 288 



Bivalve shells of Brachiopoda, 91, 92 



Blenny, 294 



Blepharoplasts, 388 



Blind trilobites, 146 



Blow fly, median eyes of, 14 



Bombinator igneus, 14, 229, 231 



Bones, dermal, 336 



Bos tanrus, 317, 432 



Bothriolepis, 467, 469, 470 



Brachionus rubens, 89 



Brachiopoda, 91 



Brain, 



median sagittal section of, 413 



transverse section of containing tumour, 

 414 



transverse section of through pineal 

 body, 415 



median section through pineal region, 

 416 

 Brain-sand, 191 

 Branchial eyes of Annelids, 99 

 Branchiommi Kollikeri, sensitivity to light, 



101 

 Branchiosanrus amblystomus, 236 

 Branchipus, 145, 369, 373, 469 



triplacodal eye of, 362 

 Breasts, enlargement of, 439 

 Bruch, membrane of, 78 

 Buccinum undatum, 151 

 Bufo, 74, 230 

 Bunodes, 359 



Ca:cilia, 227 



Caiman niger, 240 



Calamoichthys, 336 



Calanella mediterranean 301 



Calcareous deposits, 469 



Calcium phosphate, 64, 71, 191, 286 



Callorhynchus, pineal body, 209 



Calotes, 



ophiomachus, 273, 274 



versicolor, 273, 274 

 Cambrian period, 



extinct nautiloid Tetrabranchiata, 163 



fossil Brachiopoda, 92 



median eyes of Trilobites in, 145 

 Canals, dentinal, 342 

 Capitosaurus, 237 



Caprella acutifrons, compound eye of, 111 

 Capsule, 



chitinous, of eyes of Hydrachnids, 129 

 of median eyes of Candida;, 144 



fibrous, of parietal organ, 259, 280 

 Carapace, 



chitinous, 124, 125 



of Apus, 104 



of Lepidurus, 106 



of Limulus, 103, 108 

 Cardium 



edule, 357 



nuticum, 346, 357 

 Candida;, median eyes of, 144 

 Cartilage, 



cranial, of Nautilus, 163 



infundibular, of Sepiolia, 164 



in teratomata, 431 



