No. 4-] MALE REPRODUCTIVE CELLS OE INSECTS. 1 97 



matin reticulum of the resting cell ; the halving of each chro- 

 mosome in metakinesis results in the formation of two daughter- 

 elements, each of which has the value of a chromosome only 

 in the daughter-cell in which it comes to lie ; that is to say, 

 metakinesis doubles the number of chromosomes. . . . The 

 chromosome must be ascribed an actual value (in relation to 

 the cell generation in which it occurs) irrespective of any pro- 

 spective or retrospective value." 



The body under consideration fulfills the conditions of the 

 definition, and therefore should be classed with the chromo- 

 somes. It is to be hoped that we shall soon be in a position to 

 give it a more exact status among these chromatin elements. 



