SPERMATOGENESIS OF EUCHROMA GIGAXTEA. 173 



developed ditYerx-nt proteid substances which, when combined 

 with the nucleic acid of the karyosphere, become active and color- 

 aMc by chromatin stains. It may be that usually in the devel- 

 opment ot tin UITIII cells the nucleic acid becomes chemically 

 <li"o< 'fated. Inn not visibly separated from these proteid -ub- 

 Btan !i-e<|iiuuly no karyosphere is present, simply 



rliroMio-oiix - coii-iMing of a condensed linin framework sur- 

 rounded by nucleic acid. 



PHIL \HI.I rin \ NKMAL SCHOOL, 



Jt;: 



LITERATURE. 



Berghs, J. 



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Jour K\i>. /.'..| . \ 1., i. 



