140 AllT. r2. K. YENDO. 



Our specimen seems to iiccoi'd 2:»retty well with the diagnosis 

 of Sargassum aqiiifoUum. Ag. The species is defined as having 

 n complanated stem and repando-dentated leaves. These char- 

 acters, however, can not be tested in our specimen as it lacks 

 the lower portion of the frond. Reinbold ^^ states that the fact 

 that the ribs are nearly entirely wanting or are scarcely visible 

 clearly characterizes the leaves of Sargassum aquifolium Ag. Other 

 writers also agree in describing the plant as having semi-enervous 

 leaves or subevanescent ribs on the leaves, while Kutzing 

 delineates the ribs very clearly in his Tab. Phyc, 1. c. 



I cannot but mention with query the present species as oc- 

 curring in our region, as the specimen on hand is fragmentary. 

 Anyway it is plain from the specimen that a species belonging to 

 the tribe Fruiiculifenc and closely related to this species, should 

 be added to the algal flora of Japan. 



Locality. Izu Prov. (K. Tani) (!). 



Sav(jassuni olttusifoliwiti J. Ag. 



»Spec. Alg. 1. p. oo'J. — /(/.: Spec. 8arg. Austr. p. lOo. — Maetens : 

 Prelis. Exped. Taugc. p. 116. — Dickie: Alg. Jap. in Jouin. Linn. Sue. 

 Bot. XV. p. 449.— De Tom: Syll. Alg. 111. p. 79.— /(/.: I'hyc. Jai). 

 Nov. p. 45. — Okam.: Eiuuner. Alg. Jap. p. 156. 



I doubt the occurrence of this species within our boundary. 

 Localities : Nagasaki (Schottmüllek, Martens) ; Akashi 

 channel (Moseley, Dickie). 



Sftvf/assuni latifoliuni J. At;. 



Spec. I. Alg.' p. :\Sß.—JcL: Spec. Sarg. Austr. p. 103.— De Not: Alg. 

 JMar. Kc-so. p. 18.— Dk Toni: Syll. Alg. III. p. 78.— O'Kuntze: 

 Kevisio von Sarg. p. 217. 



1) Sary. v. Iiul. Arch. ]>. 74. 



