CONTENTS. IX 



PAGE 



Ivaestner, Sandor — Embryological Methods 30 



Rosner, A. — Monochorial Twins 159 



Bergh, R. S. — Origin of Blood-vessels 160 



Schimkewitsch, W. — Influences of Injections into the Albumen of Fowls' Eggs . . 160 



Nussbaum, M. — Cell-division and Mitosis 160 



Loyez. Makie — Germinal Vesicle of Reptiles 161 



Battelli, F. — Rheotactie Properties of Spermatozoa 161 



Loisel, G. — Function of Sertoli's Cells 161 



Broman, Ivar — Movements of Spermatids and their Parts 102 



Prowazek, S. — Tetrads in Spermatogenesis 162 



Bild, A. — Development of Teeth iti S us domestica 162 



Fischer, Eugen — Chondrocranium of Cercopithecus cynomolgus 163 



Aigner, Albert — Epithelium of Epididymis in Mammals 163 



Hammar, Aug. — Development of Ear in Man 163 



SziLi, A. — Development of Iris in Man 164 



Leche, W. — Alleged Case of Transmission of Acquired Characters 164 



SALYi, G— Copulation of Bats 164 



Strasser, H, — Olfactory Organ in Vertebrates 164 



Volker — Development of Pancreas in Amniota 165 



Pedaschenko, D. — Development of Mid-brain in Bony Fish 165 



Schumacher, Siegmund v. — Yolk-organ of Salmo fario 166 



Waite, Edgar R,— Development of Galeus antarclicus 166 



Schneider, Guido — Life-history of CI upea sprattus 166 



Byrne, L. W. — Young of Montagu's Blenny 167 



Dybowski, B. — Life-history and Young Stages of the " Fat-Fish" of Lake Baikal 167 



Kennel, J. — P rogeny of a Tailless Cat 292 



Loisel, G. — Spermatogenesis in Sparrow 293 



Kolster, R. — Peculiar Process in Seminal Vesicles of Elk 293 



Houssay, F. — Influence of Diet on Egg-Laying in the Fowl 294 



Mitrophanow, P. — Early Stages in the Development of Duck and Tern 29-4 



Le Hello — Maternal Impression in a Mare 294 



Ccenot, L. — Heredity Studied in Alice 294 



Hunter, S. J. — Artificial Parthenogenesis in Arbacia induced by the Use of Sea- 

 water concentrated by Evaporation 418 



Boveri, Th. — Problem of Fertilisation 418 



IIertwig, R. — Nature of Fertilisation 419 



Blanchard, N. — Grand-parental Inheritance 419 



Beard, J. — Numerical Law of the Germ-Cells 419 



Kobf, K. von — Spermatogenesis in Phalangista vulpina 419 



>WINNerton, H. H. — Morphology of Teleostean Head Skeleton 420 



Denis, P. — Development of Inner Ear in Bat 420 



Williams, S. R— Migration of Eye of Flat- Fish 420 



Reese, A. M. — Thyroid of Lamprey 421 



Zolotnisky, N. — Reproduction of Gerardinus decemmaculatus 421 



Brauer, A. — Development of Excretory Organs in Gymnophiona 421 



Southwell, T. — Hermaphroditism in the Herring 421 



Kidd, W. — Argument for the Use- Inheritance Interpretation 421 



Ewart, J. Cossar — Variation: Germinal and Environmental . . ' 533 



Beard, J. — Determination of Sex in Animal Development 534 



Van Lint, A. — Determination of Sex 535 



Biller, A. H. R. — External Phenomena of Fertilisation 536 



Morgan, T. H. — Dispensability of Gravity in Development of Toad' s Egg .. .. 537 



(tIardina, A. — Early Stages in Oogenesis and the Synaptic Phases 537 



Bataillon, E. — Experimental Parthenogenesis in Amphibians 537 



Meyer, J. A. — Disruptive Processes in Ovarian Ova of Lacerta agilis 538 



Loisel, G. — Internal Secretion of Testis 538 



•Janssens, J. A. — Spermatogenesis in Newt 538 



Merlin, A. A. — Spermatozoon of Rat 538 



Ballowitz, E. — Two-tailed Spermatozoa 5:;S 



Capurro, M. A. — Alleged Peritubular Lymphatic Tubes of the Testis 538 



Cameron, J. — Development of Layers of Retina •_ ) ;' s 



Berliner, K. — Uofmann's Nuclei (Kolliker) in Spinal Cord of Chick 539 



