Chromntin as ''Hereditary Subfita/nce'' 



327 



worker; and since there is nothing inherently improbable in 

 the results, it seems justifiable to take them as conclusive, 

 at least in main outline. The observations on the develop- 







m. 



mac r. -^ 





^ 



i3»r ^--■■iM»S' villf^y ^ 







rrJ^-' 





— -*^'<^ .••^>Si:.!:V.--= ::...•. ■. '..■■. •■.■•.!\ •/■.•.■.■•^••.'.;x-:-> 



;->ic;:.!:.y.- 





FTOURT; 15. FROXTOXTA T.EUCAS ( AFTER TOXXTGEs). 



c, cilia. Corp., cortical plasma, end., endoplasm. fd., food, macr., 

 macromicleiis. micr., micronucleus. tr., trichocysts. trcli., tricho- 

 chroniidia. 



ment of the trichocysts that specially concern us now may 

 be stated in a short paragraph. 



The organs (trch. figure 15) originate in the macronu- 

 cleus {macr.) and migrate through the nuclear membrane 



