author's abstract of this paper issued 

 by the bibliographic service october 13 



OOGENESIS IN THE WHITE MOUSE 



H. M. KINGERY 



From tlie Dcpniiniciit of Histology and Emhri/ology, Cornell University, Ithaca, 



New York 



FIFTY-TWO FIGURES 



CONTENTS 



Introduction 261 



Material and methods 264 



Morphogenesis of the ovary 265 



Proliferations of cells from the germinal epithelium 265 



The formation of 'primitive germ cells' 267 



The formation of 'definitive germ cells' 268 



The tunica albuginea, rete ovarii, and periovarian capsul or bursaovarica 269 



Oogenesis. The development and differentiation of the germ cells 271 



First proliferation : 'primitive oocytes' 272 



Second proliferation : 'definitive oocytes' 276 



Discussion. Literature and observations 281 



The genuineness of a 'new formation' of egg-cells 282 



The origin of the definitive ova 283 



The 'new formation' of egg-cells 287 



The question of the mitochondria 291 



The prolonged potentiality of the germinal epithelium for germ cell 



production 293 



The question of synizesis and synapsis 294 



The degeneration of the cells of the first and second proliferations .... 800 



Smnmary and conclusions 301 



Bibliography 304 



INTRODUCTION 



In the last two decades or so there has been produced a vast 

 amount of cytological work which has had as its object the 

 description and explanation of the structure, behavior, and 

 nature of the chromosomes. Particular attention has been paid 

 to the maturation divisions in the two processes oogenesis and 

 spermatogenesis and to the stages leading up to these. Two 

 facts seem to stand out clearly enough: — that by these two 



261 



JOURNAL OK MORPHOLOGY, VOL. 30, NO. 1 



