THF, rrr.\f'E/E or J.\r.\x. 111 



notes that the receptacles of tliese S[)ecies have an arrangement 

 simihir to that of the members of the Baclrophycus while the 

 characters of the vesicles have a greater resemblance to those of 

 the Eumrgassum. The present writer can not hold with the 

 opinion that the roundness or apiculation of the vesicles in a. 

 frond is a sufficiently important point to serve for subgeneric 

 distinction. As has been repeatedly stated in the preceding 

 chapters, the vesicles are in some species generally mnticous 

 in the lower parts of the fronds, while in the upper and younger 

 portions they are often apiculated or mucroiiated. In Sargassum 

 énerve which is undoubtedly a member of the Bactrophycus, 

 some of the vesicles are round-headed in the young sterile fronds; 

 ;ind in Sargassum fuheUum some of the vesicles are mnticous 

 while others in the same individual are apiculated. In Sargassum 

 Kjellmanianum we noticed that the southern and the northern 

 forms differed essentially in the shape of the vesicles. In Sar- 

 gassum Ringgoldianum which has been counted as a member of 

 the Baclrophycus, the vesicles are coronated with an enormously 

 prolonged spathulate leaflet, while the receptacular ramulets claim 

 a position for the species somewhere outside that subgenus. 



Sargassum Miyabei has a close resemblance to the present 

 species. They are so alike that in sterile specimens the species 

 may not be discriminated with safet}-. When fertile, however, 

 the former can be readily separated from the latter by the 

 absence of the bractlets at the bases of the receptacles. Other 

 points will be discussed later on. 



Localities: Cape Nomo, Hizen Prov. (Kjellman, J. Agardii) ; 

 Fusaii, Korea (N. Yabe, herb. sc. coll.); Hagi, Iwami Prov. (J. 

 NiKAi, HERB. SC. COLL.); Wakasa Prov. (P. Tsuge)(!); Noto 

 Prov. (K. Okamura); Echigo Prov. (!); Shimofuro, Mutsu 



