No. 2.] BA TRACHOSEPS A TTEXU. 1 T( r S. 109 



sess no perfect resting stage, the chromioles being arranged 

 into leaders and always connected with the chromoplasts ; there 

 is but one generation ; the daughter-cells are the spermato- 

 cytes ; and they have numerous fiber cones at the end of the 

 anaphase. 



The spermatocytes are characterized as follows : They have 

 numerous fiber cones in the beginning of the mitosis, homo- 

 typic mitosis with twelve chromosomes and with equation 

 division ; no bouquet stage and no perfect resting stage ; but 

 one generation ; the daughter-cells are the spermatids which 

 give rise to the spermatozoa through direct development and 

 growth ; and the chromosomes are I -shaped. 



THE MITOSIS. 



The mitosis is the result of two distinct and separate proc- 

 esses which, for the greater part, run parallel and independent 

 of each other, but which meet at certain nodes in order to 



FIG. 14. A diagrammatic representation of the structure of the granosphere. The dotted 

 globules are cytoplasmic granules, and between them are seen metaplasmic secretions 

 represented by small open rings. The globules are connected by Linopodia, and form 

 a foam structure, partly a network. 



accomplish certain objects jointly. These processes are the 

 chromosomic process and the radiosomic process. 



The radiosomic process is presided over by the archosome 

 and the accessory archosomes, and consists in the development 

 and evolution of the various fibers and the central spindle, in 

 the evolution of the spheres, and the dissolution of the nuclear 

 membrane. To this process belong also the development and 

 dissolution of the false nuclear membrane and the reabsorp- 

 tion of the fibers. 



The chromosomic process is presided over by the chromo- 



