IXDEX. 



647 



brancliii, 46, 47, 48 ; Teleostei, 59 ; 

 Petromyzon, 76,80; Aves, 141; Kabbit, 

 190 ; general development of, 387 ; evo- 

 lution of, 387, 388 ; simple, 395 ; com- 

 pound, 396 ; aconous, 396 ; pseudo- 

 conous, 396 ; of Invertebrata, 388 ; of 

 Vertebrata, 398 ; comparative develop- 

 ment of Vertebrate, 409 ; of Ammoccetes, 

 409 ; of Tunicata, 418 ; of Chordata, 

 general views on, 419 ; accessory eyes 

 of Fishes, 420 ; muscles of, 558 

 Eyelids, development of, 416 



Falciform ligament, 623 



Falx cerebri, 361 



Fasciculi teretes, of Elasmobranchii, 350 



Feathers, development of, 327 



Fenestra rotunda and ovalis, 436 



Fertilization, of Am^jhioxus, 2 ; of Uro- 

 chorda, 8 ; Salpa, 24 ; Elasmobranchii, 

 33 ; of Teleostei, 55 ; Petromyzon, 69 ; 

 Amphibia, 99 ; Chick, 121 ; EeptUia, 

 167 ; meaning of, 274 



Fifth nerve, development of, 378 



Fifth ventricle, 365 



Fins, of Elasmobranchii, 51 ; Teleostei, 

 63 ; Petromyzon, 77, 78 ; Acipeuser, 89 ; 

 Lepidosteus, 97 ; relation of paired to 

 unpaired, 501, 503 ; development of 

 pelvic, 504 ; development of pectoral, 

 504 ; views on nature of paired fins, 506 



Fissures of spinal cord, 344 



Foetal development, 297 ; secondary varia- 

 tions in, 298 



Foot, 508 



Foramen of Munro, 354, 360 



Foramen ovale, 528 



Forebrain, of Elasmobranchii, 46, 48, 49 ; 

 Petromyzon, 76 ; general development 

 of, 353 



Formative cells, of Chick, 124 



Fornix, development of, 365 



Fornix of Gottsche, 352 



Fourth nerve, 382 



Frontals, 487 



Fronto-nasal process, of Chick, 149 



Gaertner's canals, 597 



Gall-bladder, 633 



Ganoidei, development of, 84 ; relations 

 of, 98 ; nares of, 440 ; notochord of, 

 450 ; vertebral column of, 450, 456 ; 

 ribs of, 462 ; pelvic girdle of, 498 ; arte- 

 rial system of, 530 ; excretory organs 

 of, 580 ; generative ducts of, 605 



Gastropoda, eye of, 389 



Gastrula, of Amphioxus, 2 ; of Ascidia, 9 ; 

 Elasmobranchii, 35, 36 ; Petromyzon, 

 70 ; Acipenser, 85 ; Amphibia, 102 ; 

 comparative development of, in Inver- 

 tebrata, 229 ; comparison of Mammalian, 

 242 ; phylogenetic meaning of, 275 ; 

 ontogeny of (general), 276 ; phylogeny 

 of, 280 — 285 ; secondary types of, 282 



Geckos, vertebral column of, 459 



Generative cells, development of, 610 ; 

 origin of in Coelenterata, 610; of In- 

 vertebrata, 612 ; of Vertebrata, 614 



Generative ducts, of Teleostei, 580, 605 ; 

 of Ganoids, 580 ; of Cyclostomata, 603 ; 

 origin of, 604 ; of Lepidosteus, 605, 

 617 ; development and evolution of, 

 616 ; of Coelenterata, 616 ; of Sagitta, 

 616; of Tunicata, 616; Chastopoda, 

 Gephyrea, etc., 617 ; of Mollusca, 618 ; 

 of Discophora, 618 ; of Echinodermata, 

 619 



Generative system of Elasmobranchii, 42 



Gephyrea, nervous system of, 340 ; excre- 

 tory organs of, 566 ; generative cells of, 

 612 ; generative ducts of, 617 



Germinal disc, of Elasmobranchii, 33 ; 

 Teleostei, 55 ; Chick, 122 



Germinal epithehum, 614 



Germinal layers, summary of organs de- 

 rived from, in Vertebrata, 252 ; his- 

 torical account of views of, 275 ; homo- 

 logies of in the Metazoa, 285 



Germinal wall of Chick, 126, 132 ; struc- 

 ture and changes of, 133 



Geryonia, auditory organ of, 424 



Gill of Salpa, 26 



Giraldes, organ of, 598 



Glands, epidermic, development of, 328 



Glomerulus, external, of Chick, 590 



Glossopharyngeal nerve, development of, 

 375, 376 



Grey matter of spinal cord, 343 ; of brain, 

 348 



Growth in length of Vertebrate embryo, 

 254 



Guinea-pig, primitive streak of, 186 ; noto- 

 chord of, 187 ; placenta of, 201 ; deve- 

 lopment of, 218 



Gymnophiona, see 'Ccecilia' 



Habenula perforata, 432 



Hairs, development of, 328 



Halichfflrus, placenta of, 207 



Hand, 508 



Head, comparative account of, 260 ; seg- 

 mentation of, 261 



Head cavities, of Elasmobranchii, 41 ; 

 Petromyzon, 74, 79 ; Amphibia, 105 ; 

 general development of, 558 



Head-fold of Chick, 130, 139 



Head-kidney, see 'Pronephros' 



Heart, of Pyrosoma, 21 ; Elasmobranchii, 

 42, 48; Petromyzon, 77, 80; Acipen- 

 ser, 87 ; Chick, 141 ; first appearance 

 of in Rabbit, 190 ; general development 

 of, 520; of Fishes, 522, 524; of Mam- 

 malia, 522 ; of Birds, 523, 525 ; mean- 

 ing of development of, 524 ; of Amphi- 

 bia, 525 ; of Amniota, 525 ; change of 

 position of, 529 



Hind-brain, Elasmobranchii, 46, 48, 49; 

 Petromyzon, 76 ; general account of, 348 



