Auf?. I'jni'i 



THE con RELATION IN THE DRTERENTIATION. 



161 



Tabic V. Summary of Tables I, II, III and IV. 



70 



i;!0 



200 



The influence of concentration and the intensity of lig^ht is ap- 

 parent, and tlie remarkable feature is the almost complete dioecism 

 found in all cultui-es. This condition persisted practicalh' unchanged 

 throughout the entire period of the experiment. It means that the 

 development of one sex suppresses or inhibits the development of other 

 sex complete]}'. In another words, the perfect negative correlation 

 exists between tlie formation of antheridia and archegonia within a 

 single prothallium. As is clear by tlic preceeding tables, a definite re- 

 lation is also observed between the shape of prothallia and the formation 



