approach it, are E. sphcerophorus and E. brackiatus, but both 

 these differ in fructification. In some varieties the ramuli are 

 not regularly opposite. It is frequently a difficult matter to 

 trace the affinity of such wayward forms ; and possibly one or 

 two species, now confounded with E. granulosus, may eventually 

 be separated. 



Fig. 1. Tuft of Ectocarpus granulosus : — of the natural size. 2. Portion of 

 a fertile branch. 3. Kamuli and utricles from the same : — both magnified 

 in different degrees. 



