IS ART. 12. — K. YENDO. 



obliged to follow implicitly his classification in the determination 

 of the various forms of Fucus inflatus. 



Our form may be referred to /. edentatus Roseny. with 

 satisfaction, and accords es2:)ecially well with the figure and des- 

 cription of a plant from Tliorshaven, illustrated by Bökgesen in 

 "Marine Alg. of Farœs " fig. 90. 



The specimens collected by myself were growing mixed with 

 Pelvetia Babingtonii f. japonica. This fact led me to wonder if 

 the plants that I had considered as the high tide form of the 

 latter were not a form of the plant in question. The high tide 

 form of Pelvetia Babingtonii f. japonica has indeed some resem- 

 blance to Fucus inflatus f. disiicus as will be stated hereafter. 

 I have no reason to deny the occurrence of the last mentioned 

 forma weithin our boundaries: the high tide form, however, which 

 I mention below under Pelvetia Babingtonii f. Wrightii, may 

 1)6 conclusively proved not to belong to Fucus inflatus. 



Kjellman^^ mentions a single species. Fucus evanescens, in 

 his list of Algie from Bering Strait. He describes several 

 formce under it from there, but does not 2:ive anv account of 

 Fucus inflatus or forms resembling it. 



There are numerous examples in the specimens at our hand 

 which show a character intermediate between Fucus evanescens 

 and Fucus inflatus: that is, in some segments of a frond the 

 ribs reach to the apices while in others they disappear at some 

 distance from the ultimate points. Among the specimens which 

 I mentioned under the preceding species many have the ribs in 

 some segments quite to the apices. 



It may be easily imagined, taking Fucus inflatus as a valid 

 species, that in places where the t^'o species occur together, 



1) Kjr.LLMAN : lîerin^liiifvets Algflora, p. 34. 



