golgi bodies in dytiscus 157 



5. Conclusion. 



We may now recognize the following modes of behaviour 

 of the Golgi bodies during nuclear division : 



(1) During karyokinesis the Golgi bodies may either, 

 (a) remain scattered in the cytoplasm and be approxi- 

 mately shared out amongst the two newly-forming 

 cells, e. g. male germ-cells of Stenobothrus (5) ; 



(h) divide into two masses surrounding the separating 

 centrosomes and thus pass into each cell, e. g. (i) during 

 meiosis in the male germ-cells of the Molluscs, Helix 

 and Limnaea, and the Mammals, Mus and Cavia (5) ; 

 (ii) during mitosis in the epithehal cells of Descemet's 

 membrane and connective-tissue cells of the cornea (1). 



(2) During amitosis either they 



(a) remain as a number of elements or dictyosomes arranged 

 around the archoplasm, e. g. in mammalian epithelium 

 (1), or they 

 {h) become irregularly scattered throughout the cytoplasm, 

 as described in this paper in the folhcle cells of insects' 

 ovaries. 

 It is suggested that these differences are related to different 

 conditions of metabolism existing in cells exhibiting these 

 phenomena. 



6. Bibliography. 



1. Deinecka, D. — " Der Netzapparat von Golgi in einigen Epithel- und 



Bindegewebszellen wahrend der Ruhe und wahrend der Teilung 

 derselben ", ' Anat. Anz.', 1912. 



2. Flemming, W. — " Attraktionsspharen u. Centralkorper in Gewebs 



u. Wanderzellen ", ' Anat. Anz.', 1891. 



2a. " Entwicklung und Stand der Kenntnisse iiber Amitose ", 



' Merkel und Bonnet's Ergebnisse d. Anat. u. Entwick.', 1892. 



3. Gatenby, J. Bronte. — " Cytoplasmic Inclusions of the Germ-cells, 



Part V. The Gametogenesis and Early Development of Limnaea 

 stag n alls, with special reference to the Golgi Apparatus and 

 Mitochondria ", ' Quart. Journ. Micr. Sci.', vol. 68. 



4. " Identification of Intracellular Structures ", ' Jouin. Roy. 



Micr. Soc,', 1919. 



M 2 



