Chromatin as ''HereiUtarjf Substance'* 



32' 



worker; and since there is notliinfr inherently Iniproljable in 

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

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









^^-TV'.^^ *--•■•■•. ■•• ^-^ ^■'- ■■■■■/■ "i^.r 









[3cn.d.. 



mac r. -= 







rp. 









••v>^ 



FIGURE 15. FROXTOXTA LEUCAS (aFTI:R TOXXIOEs). 



c, cilia. Corp., cortical plasma, end., endoj^lasm. fd., food, iiiacr., 

 macroniicleus. micr., niicroniicleiis, tr., tricliocysts. trch., tricho- 

 chromidia. 



ment of the trichocysts that specially concern us now may 

 be stated in a short parafi^rajih. 



The organs {trch. figure 15) originate In tlit- macronu- 

 cleus (macr.) and migrate through the tuiclear membrane 



