INDEX 



The numbers refer to pages, the darker figures indicate illustrations 



Abnutzungspigmente, 62 

 Acaudata, 227 

 Acanthias, 



" accessory eyes," 203, 470 

 bilateral parietal foramen, 208 

 heart-shaped end vesicle, 207 

 sections of embryonic brain, 4, 180, 205 

 Accessory cavity of pineal organ, 259 

 Accessory pineal organ(s), 468 

 of Amiacalva, 213, 214, 215 

 of Phrynosoma, 245 

 of Pseudoptis, 244, 248 

 of reptiles, 240 

 Acilius, 363, 379 



cuticular + vitreous lens, 53 

 eye of larval, 18, 54, 120 

 sulcatus, 189 

 Acipenser, 



nerve endings of pineal organ, 207 

 pineal diverticulum of embryo, 211 

 structure of pineal organ, 210, 211 

 Acmcea virginea, 159, 160 

 Acrania, 168, 178 

 Adiadochokinesia, 438 

 Adiposity, 427, 431, 439, 455 

 Adrenaline, 60 

 Mglina prisca, 137 

 Agama, 273 

 caucasica, 275 

 hispida, 274 

 Agamida:, 252, 272, 273 

 Agelena, 113 



cerebral grooves of, 128 

 inversion of layers of retina, 127, 371 

 Agnathi(a), 29, 344 

 Agnostus, 136 

 Agraulus, 136 

 Air sinuses, 

 frontal, 131 

 maxillary, 131 

 Albinism, 60 

 Alligator, 240 

 Alytes, 426 

 Alytes obstetricans, 74 

 Amber, Baltic, 342 

 Amblyrhynchus cristatus, 275 

 Amblystoma, 224 



piinctatum, pineal region of, 226 

 Amblystomes, retardation of metamor- 

 phosis, 426 

 Amia calva, pineal organs of, 212, 213, 214, 



215, 292, 337 

 Ammoccetes, 29 



cartilaginous skeleton, 164 

 lateral eye of, 375 



Ammoccetes, 



parietal foramen of, 191 

 pineal eye of, 19 

 Ammonites, 152, 163, 354 

 Amphibia, 



blind cave-dwelling, 225, 226 

 eyes of, 224 



pigment-free area of cornea, 74 



pigmentation of epiphysis, 74 



Amphineura, 147, 156, 157, 158,345 



Amphioxus, 168, 170, 179, 215, 387 



vestigial character of pigment spot, 

 216 

 Amphiwna, 224 

 Anaesthesia, 441 

 Anaspida, 331, 344, 467 

 Androctonus fwiestus, 131 

 Annelid, eyes of, 21 

 Anguis fragilis, 6, 62, 246 

 parietal eye, 20 

 pigment in lens, 255 

 Annelida, 169, 353 

 compound eyes of, 99 

 compound eyes on branchia;, 66 

 Annulata, eyes of, 96 

 Anolis, 242, 271, 275, 276 

 Anomodont reptiles, 300 

 Anophthalmos, 37 

 Anser, brachyrhynchus, 75 

 Ant eater, spiny, 323 

 Anterior perforated space, 417 

 Antiarchi, 344, 465, 472 

 Anura, 224, 227, 234 



nerves of parietal organ and epiphysis 

 of, 230 

 Aperture, external, 



of eyes of cephalopods, 50 

 of hypophysis, 328 

 of nares, 328 

 of nautilus, 152, 162 

 Apical plate, 88, 150, 156, 158, 168, 170, 



172 

 Apis, 342 

 Aplacophora, 354 

 Apoda, 224 

 Apterygota, 116 

 Apteryx, 46 



Apus, 136, 328, 359, 373, 469 

 cancriformis, 104 



development of parietal eye-vesicle, 350,. 

 360, 

 Aqueduct of Sylvius, 415, 419 

 compression of, 457, 465 

 occlusion of, 433, 436 

 Aracheoniscus, 342 



509 



