INDEX. 



785 



Fenestra rotunda and ovalis, 529 



Fertilization, of Amphioxus, 2 ; of Uro- 

 chorda, 9; Salpa, 29; Elasmobranchii, 

 46; of Teleostei, 68; Petromyzon, 84; 

 Amphibia, 120; Chick, 145 ; Reptilia, 

 202 ; meaning of, 331 



Fifth nerve, development of, 460 



Fifth ventricle, 443 



Fins, of Elasmobranchii, 62 ; Teleostei, 

 78 ; Petromyzon, 94, 95 ; Acipenser, 

 109; Lepidosteus, 118; relation of 

 paired to unpaired, 611, 612 ; develop- 

 ment of pelvic, 614; development of 

 pectoral, 615 ; views on nature of paired 

 fins, 616 



Fissures of spinal cord, 417 



Foetal development, 360 ; secondary va- 

 riations in, 361 



Foot, 618 



Foramen of Munro, 430, 438 



Foramen ovale, 642 



Forebrain, of Elasmobranchii, 55, 59, 60; 

 Petromyzon, 93 ; general development 

 of, 428 



Formative cells, of Chick, 154 



Fornix, development of, 443 



Fornix of Gottsche, 428 



Fourth nerve, 464 



Frontals, 592 



Fronto-nasal process of Chick, 179 



Gaertner's canals, 724 



Gall-bladder, 770 



Ganoidei, development of, 102 ; relations 

 of, 118; nares of, 534; notochord of, 

 546; vertebral column of, 546, 553; 

 ribs of, 561 ; pelvic girdle of, 606; arte- 

 rial system of, 645 ; excretory organs 

 of, 704; generative ducts of, 734 



Gastropoda, eye of, 472 



Gastrula,of Amphioxus, 2; of Ascidia, io; 

 Elasmobranchii, 43, 44 ; Petromyzon, 

 86; Acipenser, 103; Amphibia, 123; 

 comparative development of, in Inver- 

 tebrata, 275 ; comparison of Mamma- 

 lian, 291 ; phylogenetic meaning of, 333; 

 ontogeny of (general), 333 ; phylogeny 

 of, 338 343 ; secondary types of, 341 



Geckos, vertebral column of, 557 



Generative cells, development of, 741; 

 origin of in Crelenterata, 741 ; of In- 

 vertebrata, 743 ; of Vertebrata, 746 



Generative ducts, of Teleostei, 704, 735 ; 

 of Ganoids, 704; of Cyclostomata, 733; 

 origin of, 733 ; of Lepidosteus, 735, 

 750 ; development and evolution of, 

 74S ; of Cu-lenterata, 748; of Sagitta, 

 749 ; of Tunicata, 749 ; Chtctopoda, 

 Gephyrea, etc., 749 ; of Mollusca, 751 ; 

 of I >iscophora, 751 ; of Echinodermata, 

 752 



Generative system of Elasmobranchii, 51 



Gephyrea, nervous system of, 412; excre- 

 tory organs of, 686 ; generative cells of, 

 7 ).',: giTUM-ntive ducts of, 749 



1'.. III. 



Germinal disc, of Elasmobranchii, 40 ; 

 Teleostei, 68 ; Chick, 147 



Germinal epithelium, 746 



Germinal layers, summary of organs do- 

 rived from, in Vertebrata, 304 ; his- 

 torical account of views of, 332 ; homo- 

 logies of in the Metazoa, 345 



Germinal wall of Chick, 152, 159; struc- 

 ture and changes of, 1 60 



Geryonia, auditory organ of, 515 



Gill of Salpa, 31 



Giraldes, organ of, 725 



Glands, epidermic, development of, 397 



Glomerulus, external, of Chick, 716 



Glossopharyngeal nerve, development of, 



456, 457 

 Grey matter of spinal cord, 417; of brain, 



423 



Growth in length of Vertebrate embryo, 



306 

 Guinea-pig, primitive streak of, 223 ; 



notochord of, 226 ; placenta of, 242 ; 



development of, 262 

 Gymnophiona, see ' Coecilia ' 



Habenula perforata, 525 



Hairs, development of, 396 



Halichrerus, placenta of, 250 



Hand, 619 



Head, comparative account of, 313; seg- 

 mentation of, 314 



Head cavities, of Elasmobranchii, 50 ; 

 Petromyzon, 90, 96; Amphibia, 127; 

 general development of, 676 



Head-fold of Chick, 157, 167 



Head kidney, see ' Pronephros ' 



Heart, of Pyrosoma, 25; Elasmobranchii, 

 50, 58 ; Petromyzon, 94, 97 ; Acipen- 

 ser, 106; Chick, 170 ; first appearance 

 of in Rabbit, 230; general development 

 of, 633 ; of Fishes, 635, 637 ; of Mam- 

 malia, 638; of Birds, 637, 639 ; mean- 

 ing of development of, 637 ; of Amphi- 

 bia, 638; of Amniota, 639 ; change of 

 position of, 643 



Hind-brain, Elasmobranchii, 55, 59, 60 ; 

 Petromyzon, 93 ; general account of, 

 424 



Hippocampus major, development of, 442 



Hirudo, development of blood-vessels of, 

 633 ; excretory organs of, 688 



Horse, placenta of, 253 



Hyaloid membrane, 492 



Hylodes, oviposition of, 121 ; metamor- 

 phosis of, 137 



Hyobranchial cleft, 572 



Hyoid arch, of Chick, 179 ; general ac- 

 count of, 572, 575 ; modifications of, 

 573, 577 ; of Elasmobranchii, 576; of 

 Teleostei, 577 ; of Amphibia, 582 ; 

 of Sauropsida, 588 ; of Mammalia, 

 589 



Hyomandibular bar of Elasmobranchii, 

 576, 577; of Teleostei, 579; of Am- 

 phibia, 582 



50 



