INDEX 



517 



Honey-bee, connections of ocelli, and facet 



eyes with brain, 122 

 Hormiphora plumosa, equilibrating organs 



of, 83 

 Horse, pigment in pineal organ of, 63 

 Horsley's bone-wax, 442 

 Hydrachnida, eyes of, 129 

 Hydrocephalus, 411, 434, 436 



internal, 442 

 Hydroctena, 83 

 Hydrodroma, eyes of, 129 

 Hydrophilus, development of, 115 

 Hygrobates, eyes of, 129 

 Hymenoptera, 362 

 Hypergenitalism, 428 

 Hyperpinealism, 440 

 Hypertrichosis, 440 

 Hypertrophy, 



of penis, 439 



of testes, 439 



simple, 430 

 Hypoderm cells, 120, 131, 133, 368 

 Hypodermis, 10, 124, 125 

 Hypopinealism, 425 

 Hypophysis, 434 

 Hypothalamus, 434, 438, 477 

 Hypsicomus, 10 1 



Ichthyophis glutinosa, 227 



Ichthyosauri, 268, 270 



Ictidosaurian reptile, 301 



Iguana tuberculata, 241, 246, 247, 271, 277 



Iguanidae, 275 



Iguanodon, 268 



Imaginal disc, 117 



Impressions on glabella, 



absence of, 138, 141, 142 



lateral, 137 



median, 137, 139, 142 

 Incordination, 438 

 Infra-oesophageal ganglion, 96, 169 

 Inheritance, of defects, 47 

 Inheritance, of " negative " characters, 71 

 Insects, 



eyes of, 116 



wingless, 116 

 Intermediate zone, 



inner, 40 



outer, 40 

 Internal limiting membrane, disappear- 

 ance of, 313 

 Interparietal 



crest, 301 



ridge, 301 

 Interstitial, connective tissue cells, 125, 133 

 Intracranial pressure, 438 



increased, 449, 453, 456, 464 



reduction of, 442 

 " Intrusive " pigmented cells, 61, 125, 133 

 Inversion of retinal layers, 127, 368, 370 

 Invertebrates, eyes of, 81 

 Inverted retinal image, in lateral eyes of 



vertebrates, 121 

 Iris, 



absence of, 152, 163 



Iris, 



fixed, 61 

 fold, 51, 165 

 movable, 61 



Jellyfish, eye-spots of, 81 



Kiceraspis, 



brain, restoration of, 348 

 head-shield of, 328 



King-crab, 61, 123 



Kiwi, 46 



Labyrinthodonts, 224, 235 

 Lacerta, 242, 246 



agilis, 270, 281 



agilis et muralis, 6, 180, 201, 241-244 



ocellata, 281 



vivipara, 241, 243, 270, 273 

 Lacertida;, 280 

 Lamellibranchiata, 147 

 Lamina supraneuroporica, 183 

 Lamprey(s), 47, 187, 198, 344 



Geotria, 69 



Parietal sense-organ of, 69 



Petromyzon planeri, 68 

 Lampshell, 91 

 Lancelet, 168 



light-percipient organs of, 179 

 Larus, 



canus, 75 



glaucus, 75 



marinus, 75 

 Larva(e) of Dytiscus, 1 17 



free swimming, 92, 147 



meraspid stage of Acmaea, 159, 160 

 of Patella, 159 

 of Ver metes, 150 



trochophore, 88, 148, 91 

 Lateral eyes, 



rudimentary condition of, 225, 227 



of scorpion, 371 



of spider, upright, 373 

 Lateral ventricle, 415, 418 

 Layer, 



inner granular of optic lobe, 166 



outer granular of optic lobe, 166 

 Leeches, 



eyes of, 97 



relation of nerve-fibres to sensory cells 

 of eye, 101 

 Leiolcemus 



nitidus, 276 



tenuis, 277 

 Lemniscus, medial, 438 

 Lepidoptera, 362 

 Lens, 



absence of, 48, 147, 163, 225, 256, 275 



biconvex, 276 



inverted retinal image, 123 



cellular, 20, 149, 346 



corneal, 119, 131 



cuticular, 10, 14, 132, 133, 368, 372 



