Plate I. 



(All figures in this and all following plates are in natural size, unless specially mentioned). 



Fig8. 1-2. Fucm evane.scens Ac. 



1. From a specimen collected at Onnebetsu, in the prov. of Kitami. 

 This form is referrible to /. angtista Kjellm. 



2. The same, from a specimen colle(;ted at Esushi in the ]»rov. of 

 Kitami. This ap[)roaches botli _/! wctî*'« Kjellm. and/', bicrsùjera 

 Kjellm. at once. 



Fig. 3. Fucus inßatus Vaiil. /. edentatus Rosenv. 



Fig. 4. Pclvetia Wriglitii var. typica. a. An nltimate l)raiich with 



blister-like ampula. h. A fertile branch. 

 Fig. 5. Pclvetia Wrightu var. japonlca. a. A. ty[>ical branch, h. 



Fertile segments. 



