JOURNAL 



OF THE 



KOYAL MICROSCOPICAL SOCIETY, 



JUNE, 1920. 



TEANSACTIONS OF THE SOCIETY. 



III. — On the Belationship between the Formation of Yolk and the 

 Mitochondria and Golgi Apparatus ditring Oogenesis* 



By J. Beo^e Gatenby, B.A., B.Sc, D.Phil., Senior Demy, 

 Magdalen College, Oxford, Lecturer in Cytology, University 

 College, London ; and J. H. Woodgek, B.Sc, Assistant in 

 Zoology and Comparative Anatomy, University College, 

 London. 



{Bead April 21, 1920.) 



One Plate and Four Text-Figures. 



In this paper we have endeavoured to present some of the new 

 aspects of the various questions surrounding the origin and forma- 

 tion of those elements or bodies which together form what is known 

 as the " yolk " of the animal egg. So far as possible we have con- 

 fined ourselves to the Vertebrata, but, as much of the newer work 

 has been carried out on the oogenesis of the various Invertebrata, 

 we have been obliged to refer to them rather often. 



We have to discharge the pleasant duty of thanking Professor ^ 

 J. P. Hill, r.Pt.S., for reading over this paper and advising us, i 

 though he is not in any way responsible for any of the views we3 

 have expressed. 



Cell Elements known to occur in Somatic 

 AND Germ Cells. 



In all animal cells thoroughly studied by the modern technical 

 methods, there occur two definite categories of protoplasmic inclu- 

 sions — the mitochondria and the Golgi apparatus. In a previous 



*;;;Part of the material used in this research was supplied by a Government 

 grant of the Royal Society, for which I express my thanks. (J. B. G.) 



K 



