INDEX 



525 



Rana temporaria, 

 parietal spot in, 229 

 pineal system of, 228, 248 

 Ranidas, effects of pineal extract on larva;, 



426 

 Rat, pineal organ of, 409 

 Recess, 



infrapineal, 312 

 pineal, 311, 416 

 suprapineal, 307, 308, 311 

 Rectal saline, 446 

 Reflector of photospherion, 24 

 Reflexes, 



absence of, 438 

 increase of, 438 

 Refractile, 

 body, 54 



elements, 48, 367 

 granules, 66 

 Regeneration, 

 of head, 37 

 of lens, 56 

 Regression, signs of, 468, 469 

 Regressive characters, of fused eyes, 21 

 Reissner's fibre, 188, 265 

 Remopleurides radians, 136 

 Reptilia, 240 

 Reptiles, 



development of pineal system, 241 

 parietal foramen of, 267 

 pigmentation of pineal organ, 74 

 Reticular zone, 318, 322 

 Retina, 



compound, 15, 17 



of eyes of cephalopods, 152, 164, 166 

 hypodermal origin of, 372 

 inversion of, 370, 371 

 of median eyes of Scorpio, 370 

 of parietal organ of Ammoccetes, 19 

 of parietal organ of Lacerta, 273 

 of parietal organ of Sphenodon, 255 

 of parietal sense-organ of Geotria, 70 

 of pineal eye of Anguis fragilis, 20 

 sensory cells of, 12 

 sensory layer of, 375 

 simple, 14, 48, 49 

 Retinal 

 cells, 10 



accessory, 65 

 differentiation of, 374 

 of parietal organ of Geotria, 69, 70, 190 

 post-bacillary position of nuclei, 124 

 pras-bacillary position of nuclei, 124 

 epithelium, degeneration of, 469 

 image, inverted, 121 



in eyes of Cephalopods, 166 

 upright, 121 

 layers, bacillary, 165 

 ganglionic, 166 

 inner plexiform, 166 

 intermediate, 166 

 middle nuclear, 166 

 outer plexiform, 166 

 pigment, 375 

 placodes, coalescence of, 360, 361, 362, 

 468 



Retinula:, 52, in, 124, 125 

 differentiation of, 117 

 of median eyes of scorpion, 133 



Rhabdite, 17 



Rhabdome, 52, 65, no, 118, 119, 131, 132, 



133 



Rhabdomeres, 



postnuclear, 373 



prenuclear, 373 

 Rhinosteus, 208, 245, 329, 468 

 Rhipidoglossa, 282 

 Rhyncolepis, 331 

 Rhynconella, 92 

 Rods, 10, 14 



Romberg's sign, 438, 449, 452, 455, 458 

 Rosettes, 313, 314, 315 

 Rotifer, diagram showing position of 



median eye, 89 

 Rotifers, 



eyes of, 88 



trochophore larva of, 88 

 Round worms, eyes of, 86 



Sabella microophthahnia, 10 1 



Sagenodus, 336 



Sagitta, 



bipunctata, eyes of, 86 



hexaptera,. eyes of, 86 

 Salamander maculosa, 225 

 Salamanders, 224 

 Saline, 



hypertonic, 442 



solution, intravenous injection of, 454 

 Salmo, 



bilateral pineal diverticula, 196 



fario, 220 



fontitialis, 196 



pineal organs of, 217 



purpuratus, 220 

 Salpa, 168 



Sahicns scenicus, 124, 126 

 Sarcoma of pineal body, 59 

 Saurian reptiles, living, 271 

 Scallop, 147 

 Scaphopoda, 161 

 Scheitelfleck, 69, 71 

 Scincidae, 281 

 Scincus officinalis, 282, 283 

 Sclera, 



of median eye of scorpion, 368, 372 



of schizochroal eyes, 137 

 Scleral plates, 236, 237, 268, 331 

 Scorpion(s), 



accessory lateral eyes, 371 



development of parietal eye-vesicle, 349 



extinct sea-scorpions, 473 



eyes of, 21, 123, 132, 133, 359, 370 



inversion of retina of median eyes, 368 



land, 473 



lateral eyes of, 132 



median eyes of, 133, 370 



principal lateral eyes, 371 



section of right median eye, 368 

 Scopolamine, 441 

 i Scylacops capensis, 302 



