THE ALG.E 241 



also very limited in Fucm, as it may well be on account of the 

 abundant production of male and female gametes and the greater 

 security of the offspring in the more permanent and less variable 

 habitat in the ocean. The graphical history of a Fucus plant will 

 therefore differ very little from that of Spirogyra except in the 

 details of structure and in processes concerned with reproduction. 

 On account of nuclear phenomena connected with the forma- 

 tion of the gametes in Fucus the plant body cannot properly be 

 called a gametophyte. The details of this matter do not, however, 

 belong in an elementary course in biology and are therefore 

 passed over with this brief note. 



