162 AKT. ]2. — K. YENBO. 



view, in preferring those characters on which the latter rests 

 his sections to that afforded by the growth of the plants, there is 

 no doubt that the occurrence of an apical cell at the growing point 

 characterizes certain groups of Fucaceous genera. Unfortunately 

 the material of the present species in my hands was not fitted 

 for the purpose of examination on this point. But there is little 

 doubt left that our plant belongs to the Fuco-Ascophyllum 

 group of Oltmanns, or at least stands nearer to it than to the 

 others. 



The uncertainty of the systematic position of the present 

 genus comes from our lack of knowledge of its propagating 

 organ ; and there is no positive proof that the foliose and filiform 

 types belong to one and the same species. So far as the 

 vegetative characters of the fronds of the present species shows, 

 the disjoosition of this genus in the family Fucaceae will be the 

 most leo;itimate one. 



I am strongly inclined to believe that the conceptacles, when 

 found in our plant, will be in the filiform type. If this be really 

 the case, what is the use of the foliose frond ? If, again, fructifica- 

 tion be found on both types, what is the relationshij:» between 

 the two ? The solution of these interesting problems must be 

 reserved for future investigations. 



