386 BOTANICAL GAZETTE [NOVEMBER 
the species, 24 being the gametophytic number of chromosomes; and 
the Aglaozonia form of Cutleria represents the sporophytic phase of 
the species, 48 being the sporophytic number. 
3. Aglaozonia repians contains 48 chromosomes, and the number 
is reduced in zoospore formation, the zoospore containing 24 chromo- 
somes. The zoospore with the reduced number of chromosomes 
germinates without conjugation. Although the nuclear details of the 
sporelings of A glaozonia reptans have not yet been followed, it seems 
evident that A glaozonia reptans represents the sporophytic phase of 
the individual whose gametophytic and sporophytic numbers of 
chromosomes are respectively 24 and 48. Probably Aglaozonia 
reptans as it occurs in nature is identical with the Aglaozonia form of 
Cuileria multifida which we have grown under culture and is now 
determined to be the sporophytic phase of the species. 
THE UNIVERSITY OF CHICAGO 
