126 COMPARATIVE MORPHOLOGY OF FUNGI 



assume the function of sexual cells, instead of gametes. Thereby arises 

 the possibility of the transition from hydrochory to anemochory, and 

 from hydrophily to gametangial copulation, i.e., from aquatic to terres- 

 trial habitats. Plasmogamy and caryogamy are separated in time and 

 place, and the diplophase is lengthened by the insertion of a short 

 dicaryophase beyond the true zygote. The zygotes become increasingly 

 specialized as hypnospores and finally co lect in conspicuous fructifications. 



