No. I.] SPERMATOGENESIS OF BATRACHOSEPS. 17 



due to a swelling up of the bodies as soon as they enter the 

 intercellular liquid. Bodies of both kinds accumulate often in 

 very large masses between the cells and are often found in 

 complete dissolution. In another place I have suggested that 

 the expulsion of the centrosomes is affected when there are 

 too many archosomes in the cell, more than are necessary 

 to accomplish the mitosis of the cell. 



Karyosome or Nucleus. 



General Remarks. — The constituents of the nucleus may, in 

 a general way, be divided into three parts : viz., chromatin, 

 linin, and nuclear wall. But as the nuclear wall is probably 

 only a thickening of the linin, just as the cellular wall is only a 

 thickening of the cytoplasm, we may dispense with the third 

 division and simply divide the nucleus in two distinct parts, 

 chromatin and linin. In this general division we must include 

 under chromatin such bodies as the chromoplast, directly to be 

 described, while under linin we must arrange the other class 

 of nucleoli, the linoplast, also to be further described below. 

 But while it seems that the true nucleoli or linoplasts are 

 principally of importance in furnishing or regulating the sup- 

 ply of linin, I must concede to the chromoplast a much more 

 important function, that of regulating the formation of the 

 chromosomes. It seems to me probable that the chromoplast 

 has the same function to perform inside the nucleus as the 

 archosome outside of the nucleus, and that while the archosome 

 regulates the radiosomic process or the formation of the spindle 

 and the final separation of the chromosomes, the chromoplast 

 regulates the chromosomic process inside the nucleus. 



The following elements of the nucleus are distinguished 

 and will be described more in detail below : chromioles, chro- 

 momeres, chromosomes, endochromatic granula, parachromatic 

 granula, chromoplast, chromoplasm, linin, linoplast, and nuclear 

 membrane. These constituents are not of equal value and 

 importance. The chromioles, the chromoplast, and the linin 

 granula are the most permanent elements of the nucleus. All 

 the other constituents of the nucleus, such as chromosomes, 

 chromomeres, and linoplasts are only temporary and not 



