INDEX 



957 



Jaws, rudiments of, 603 



Johnson, C. E., 716 



Joints, formation of, 695 



Jones, L., 574, 575 



Jordan, H. E., 667, 664, 733 



Jugular ganglia, of vagus nerve, 831 



Jugular veins, external, 737 



internal, 737 

 Juhn, M., 577 

 Jupiter, 53 

 Just, E. E., 237 



K 



Kaan, H. W.. 885 



Keel, solid, of neural ectoderm, in teleost 

 and bony ganoid fishes, 439, 45S 

 Keibel. P., 498 

 Keimbahn, 114, 117 

 Keimplasma, 114 

 Kendall, E. C, 877 

 Kenneth. J. H., 103 



Keratin, in stratum corneum of skin, 568 

 Kerkring, valves of, 632 

 Kerr, J. G., i07 , 324, 773, 780 

 Kidney, 772 



collecting ducts of, formation of in chick 

 embryo, 784 



functional, during embryonic develop- 

 ment, 777, 773 



mesonephric, 9 {see also Mesonephric 

 kidney) 



metanephric, 9 {see also Metanephric 

 kidney) 



pronephric, development of in frog, 779 

 importance of, 774 



regions of origin of within vertebrate 

 group, 770 



retroperitoneal position of, 787 



types of, 772 

 Kidney tubules, developing, 776 

 Kinetochore, 134, 135 

 Kingsbury. B. F., 717. 796 

 Kinoplasmic bead (droplet), in relation to 

 sperm maturation, 169 



of mammalian sperm, 148, 168 

 Koch. F. C. 22 

 Kolleker. 213 

 Kopsch, F.. 324 

 Kowalewski. A.. 288 

 Krause, end-bulb of, 840, 842 

 Krause's membrane, 702 

 Kuntz, A.. 837 

 Kupffer's vesicle. 439 

 Kupperman, H. S.. 927 



Labial groove, 616 



Labial ligament, 803 



Lacerta viridis, zona radiata of, 167 



Lacertilia, xviii 



Lacrimal glands, 853 



Lacunae, 563 



of bone, 659, 662 



trophoblastic, 920 

 Lagena, 557, 854, 855 

 Lallemand, 213 

 Lamella, of bone, 659, 662 

 Larnpetra ayresii, sea lamprey, xvi 

 Langerhans, islet of, 625, 630, 875 

 Langworthy, O. R., 722 

 Lankester, R., 390 

 Lanugo. 581 



Larsell. O., 645, 645. 646, 648 

 Larsell, Olof, 827 

 Larval forms, free-living, xiii 



non-free-living, xiii 

 Larval period, xiv 



of development, xiii 

 Laryngotracheal groove, 645, 649 

 Larynx, 718 



Lasiopyga callitrichus, placenta of, 920 

 Lateral (allantoic) veins, of chick embryo, 



745 

 Lateral body folds, 461 

 Lateral-line organs, of head, 830 

 Lateral-line system, 813, 842 

 Lateral rectus muscle, innervation of, 829 

 Lateral veins, development of, of frog em- 

 bryo, 738 

 Latitudinal plane, of cleavage, 284 

 Lavelle, A., 815 

 LaVelle. F. W.. 892 

 Law. Van Beneden's. 215 

 Lebistes (guppy). sperm survival within fe- 

 male genital tract of, 197 

 Leblond. C. P., 160 



Leeuwenhoek. and the concept of an in- 

 tangible preformationism, 213 



and the concept of gametic union, 213 



belief in preformationism, 56 

 Lens, anterior epithelium of, 845 



body, rudiment of, 845 



formation of, 849 

 Leonard, S. L., 40 

 Lepidosiren paradoxa, lungfish, xvi 



cleavage in, 307 



egg, size of, 307 



external gills of larval form, 640 



heart of, 754 

 Lepisosteus osseus, xvii 



air bladder of, 643 



cleavage in, 312 



development of skin in, 563 



