INDEX. 



735 



Fenestra rotunda and ovalis, 529 



Fertilization, of Amphioxus, i ; 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, 61 1, 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 ; phylogeneticmeaningof, 333 ; 

 ontogeny of (general), 333 ; phylogeny 

 of > 33 8 343 5 secondary types of, 34! 



Geckos, vertebral column of, 557 



Generative cells, development of, 74! ; 

 origin of in Ccelenterata, 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 Ccelenterata, 748 ; of Sagitta, 

 749 ; of Tunicata, 749 ; Chrctopoda, 

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

 of Discophora, 751 ; of Echinodermata, 



Generative system of Elasmobranchii, 51 

 Gephyrea, nervous system of, 412 ; excre- 

 tory organs of, 686 ; generative cells of, 

 743; generative ducts of, 749 



15. III. 



Germinal disc, of Elasmobranchii, 40 ; 

 Teleostei, 68 ; Chick, 147 



Germinal epithelium, 746 



Germinal layers, summary of organs de- 

 rived from, in Vertebrata, 304 ; his- 

 torical account of views of, 332 ; homo- 

 logies of in the Metazoa, 34;; 



Germinal wall of Chick, 152, 159; struc- 

 ture and changes of, 160 



Geryonia, auditory organ of, 5 1 5 



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, 41 7 ; 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 ' Ccecilia' 



Habenula perforata, 525 



Hairs, development of, 396 



Halicha^rus, placenta of, 250 



Hand, 619 



Head, comparative account of, 313; seg- 

 mentation of, 3:4 



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 <if, 

 633 ; excretory organs of, 688 



Horse, placenta of, 253 



Hyaloid membrane, 492 



Hylodes, oviposition of, 121; metamor- 

 phosis of, 137 



Hyobranchial cleft, 572 



Ilyoid arch, of Chick, 179; general ac- 

 count of, 572, 575 ; modifications of, 

 573, 577; of Elasmobranchii, 576; of 

 Teleostei, 5/7 ; of Amphibia, 582 ; 

 of Sauropsida, 588 ; of Mammalia, 



589 

 Hyomandibular bar of Elasmobranchii, 



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

 phibia, 582 



50 



