152 REGINALD JAMES LUDPORD 



become scattered in the cytoplasm of the spermatogonium 

 before cell division takes place, and they remain in this condi- 

 tion during meiosis, so that approximately a half become 

 contained within each of the newly-formed cells. A diffc^ront 

 process, however, occurs in the Mammals, Mus and Cavia, 

 and in the Molluscs, Helix and Limnaea. The Golgi bodies 

 in the spermatogonia of these types consist of a number of 

 dictyosomes arranged around the archoplasm, inside which 

 is the centrosome. As this latter organ divides, preparatory 

 to the formation of the spindle, its two constituent parts 

 separate and carry with them to both ends of the cell, approxi- 

 mately half of the archoplasm, still with the dictyosomes 

 attached. During late prophase, the dictyosomes become 

 temporarily detached from the archoplasm and scattered 

 throughout the cell, and then at the late telophase they collect 

 together again around the archoplasm. 



The examples of dictyokinesis described in our previous 

 paper were those which occurred concurrently with meiotic 

 nuclear division. Professor Gatenby suggested to me the 

 desirability of investigating the behaviour of the Golgi body 

 during amitotic nuclear division, and in the present paper is 

 described the behaviour of the apparatus during amitosis in 

 the follicle cells of the ovary of the beetle, D y t i s c u s m a r - 

 g i n a 1 i s . 



2. Previous Work. 



Deinecka (1) has described dictyokinesis in the dividing 

 epithelial cells of Descemet's membrane and comiective-tissue 

 cells of the cornea, during both mitotic and amitotic nuclear 

 division. He found that the Golgi body surrounded the 

 archoplasm, and during mitosis divided into two parts so 

 that each daughter-cell received a ' Netzapparat ', as he calls 

 it, but that in amitosis there is no division of the centrosome 

 and no change in the Golgi body. These observations are 

 quoted by Macklin (8) in support of his own conclusions 

 derived from a study of nuclear division in cells of tissue 

 cultures of the heart of the embryo chick, that amitosis involved 



