INDEX 



949 



Fertilization — (Continued) 

 of Amphioxus, 247 

 of teleost fish egg, 249 

 second stage of, 234 

 shrinkage of egg at, 235 

 sites of, in vertebrate group, 779 

 theories of, Bataillon, E., 268 

 Boveri, T., 267 

 Heilbrunn, L. V., 271 

 Lillie, F. R., 269 

 Lillie, R. S., 271 

 Loeb, J.. 268 

 Runnstrom, J., 271 

 two stages of, 243 

 Fertilization complex, 223 

 Fertilization cone, 241 

 in Asterias forbesi, 243 

 in Nereis virens, 241 

 in Toxopneustes variegatus, 241 

 Fertilization membrane, 235, 903 



action of cortical granules in formation 



of, 237 

 formation of in Arbacia, 237 



in Nereis, 239 

 in egg of sea urchin, Toxopneustes livi- 



dus, 214 

 separation of in Ascaris, 237 

 in Echinarachinus, 237 

 Fertilizin, 225, 269 

 action of, 225 



and sperm antifertilizin in the fertiliza- 

 tion process, 230 

 distribution of in animal eggs, 227 

 in egg activation to develop, 225 

 inactive, 269 



presence in egg of sea urchin, 227 

 Fetal placenta, 922 

 Fetus, mammary, xi 

 Fevold, H. L., 40, 41 

 Fiber, of skeletal muscle, dark (red), 700 



pale (white), 700 

 Fiber tracts, of spinal cord, 821 

 Fibrillary plate, of teleost fish scale, 565 

 Fibrils, of muscle, 700 

 Fibrinogenase, 33 

 Fibrinolysin, 33 

 Fibroblasts, 663 

 Fibrocartilage, 659, 665 

 Fibrois astrocytes, 810 

 Fibrous tissue, white, 657 

 development of, 663 

 Field, early, limitations imposed upon, 510 

 Field, H. H., 720, 775, 779 

 Field concept, of development, 509 

 Filament, axial of sperm, 149 

 undulating (vibratile), 149 



Fin(s), anal, 690 

 median dorsal, 690 

 tail, 690 

 Fin-ray cavities, 507 

 Fish(es), bony, skin of, 559 

 caudal fin of, types of, 715 

 coelomic changes in, 866 

 cyclostomatous, glands of, 617 

 egg transport in, 907 

 gills of, arrangements of, 639 



development of, 638 

 influence of pituitary and thyroid glands 



on development of, 885 

 integument of, anatomical characteristics 



of, 561 

 intestinal tracts of, diagrams of, 617 

 male, intromittent organ in, 185 

 myotomes, differentiation of, 714 

 parietal pericardial wall in, 871 

 respiratory surface relationships in, 638 

 skin, development of, 561 

 vertebrae, formation of, 685 

 Flagellum, of sperm, 149 



role of in fertilization, 232 

 Flemming, W., 664 

 Flexure, cervical, 511 

 cranial, 51 1 

 nuchal, 51 1 

 Flint, J. M., 648 



Flounder, Limanda ferruginea, female re- 

 productive system of, 58 

 testes, position of, 7, 10 

 testis in relation to reproductive ducts, 

 19 

 Fluid, seminal {see Seminal fluid) 

 Fluid vehicle, of lymphatic blood, 726 

 Flynn, T. T., 200, 324, 325, 362, 363, 904 

 Fold, inguinal, 1 1 

 Fol, H., 214, 235 

 Folley, S. J., 108 

 Follicle(s), egg, definition of, 70 



effects on development by gonado- 



trophic hormones, 72 

 history of after ovulation, 83 

 hormonal factors concerned with de- 

 velopment of, 72 

 mature, structure of, 74 



structure of in metatherian and 

 eutherian mammals, 74 

 of lower vertebrates, 75, 75, 76 

 prototherian, structure of, 75 

 Graafian, 70 



development of, in opossum ovary, 70 

 mature, 71, 74, 74 

 in opossum, 72 

 primary, 70 

 secondary, 70, 72 

 tertiary, 70, 72 



