INDEX 



527 



Tela choroidea, 410, 415, 416, 418 



superior, 181 

 Teleostean fishes, pineal organ of, 217, 292 

 Temperature, 



control of, 438 



rise of, 438 

 Tenon, capsule of, 129 

 Tentorium cerebelli, 310, 311 

 Teratomata, 430, 431 



limitation of to young males, 431 

 Terminal vesicle, 197, 244 

 Test, interstitial, of schizochroal eyes, 138 

 Testicle of cock, effects of pinealectomy on, 



422 

 Testudo geometrica, 252 

 Thalamencephalon, roof of, 180 

 Thaliacea, 176 

 Therapsida, 299 

 Therocephalia, 267 

 Theromorpha, 76 



Thorn-back skate, end-vesicle of, 210 

 Thyestes, 359 



Titanichthys, 245, 330, 468 

 Titanosuchus, 339 

 Tornaria larva, 168, 172 

 Tortoises, absence of parietal organ in, 252 

 Trachyodon mirabilis, 268 

 Tracts, 



medial lemnisci, 438 



pyramidal, 438 

 Tractus, 



habenularis, 194 



pinealis, 232, 246, 262, 263, 264 

 Tretaspis, 



ktceri, median eye-tubercle of, 139, 351 



seticornis, median eye-tubercle of, 139, 



351 

 Trigonum habenulce, 417 

 Trilobites, 



affinities of, 135, 328 



blind, 349 



eyes of, 136 



median-eye tubercles, 139, 473 

 Trimerocephalus, 136 

 Trinucleus, bucculentus, 140, 351, 473 

 Trionyx gangeticus, 268 

 Triplacodal eye, 



of Apus, 350, 360 



of Branchipus, 362 



of Calanella, 361 



of Cyclosalpa, 379 

 Triple eye of Calanella, 361 

 Triton, 224 



formation of lens from margin of optic 

 cup, 56 



grafting of gastrulae, 34, 35 



rubicundus, eyes of, 164 

 Trochophore larva, 



of Chiton, 158 



of Patella, 156 



of Rotifer, 88 

 Trochophore larva; of invertebrates, 168 

 Trochus, 48 

 Tropidonotus, 251, 285 

 Tuatara, 240 

 Tubicola potamilla, 66 



Tumour bed, 444 

 Tumicata, 168 



eye-spots in larva; of colonial types, 

 177 

 Turbellaria, 352 



paired eyes of, 85 



pigment spots of, 25 

 Turtle, snapping, 285 

 Twins, uniovular, 39 

 Typhlonns, 219 

 Typhlotriton, 226 

 Tyrosin, 78 



Urechia, 423 

 Urochorda, 168, 174 

 Urodela, 224 

 Uromastix, 273 



Vacancy, feeling of, 454 

 Vacuoles, 317 

 Varanus, 



giganteus, 246, 247, 270, 271 



nebulosus, 271 

 Vascular processes, ingrowing, 308, 313, 



314 



Vasodentine, 474 

 Vein(s), 



anterior choroidal, 410 



basal, 411 



choroidal, 411 



great cerebral (Galen), 307, 310, 410, 

 416, 434 



internal occipital, 411, 412 



posterior choroidal, 410 



terminal (thalamo-striate), 411 

 Velar fold, 293 

 Veliger stage of development 



of Acmcea, 160 



elimination of in higher molluscs, 167 



of Patella, 159 



of Vermetns, 150 

 Velum transversum, 180, 184, 205, 224 

 Velasia, immature form of Geotria, 69 

 Vena 



basilaris, 418 



magna cerebralis, 418 

 Venous sinuses, 



cavernous, 411 



inferior sagittal (longitudinal), 411 



straight, 411 



superior sagittal (longitudinal), 411 

 Ventricle, lateral, 



division of medial wall, 447 



exposure of tumour through, 448 



haemorrhage into, 434 



incision into, 447 



tapping of, 443, 453 

 Ventricle, third, 



haemorrhage into, 434 



invasion of, 433 



involvement of hypothalamus, 438 

 Ventriculography, 456, 459 



air, 455 

 Verbins varians, 143, 144 



