April 1918. j YENDO .-—NOTES ON ALGjE NEW TO JAPAN. FZZ7. 71 



do with the plant described by J. Agardh in the same specific 

 name. 



The plant described by Nott from the Californian material 

 under N. corallinarum should be very likely one and the same 

 species with ours. As Nott's description of the species is rather 

 incomplete, no account on the structure of frond being given, I 

 reserve the final decision for future. 



Locality. Boshu Prov. (!); ,Hiogo (Kjellman); Goto Is- 

 lands (!); Koshiki Islands (!); Hidaka Prov. (!); Hakodate (!); 

 (Y. Tanaka); Todohokke (Rosenbaum); Shimofuro (Rosenbaum); 

 Tappi (Rosenbaum); Takashima (!); Yangeshiri Islands (!) ; 

 Rishiri Island (!). 



Distribution. Australia ; California ? 



Dasya elongata Sond. 



in Mohl et Schl., Bot. Zeitg. 1845, p. 55.— De Toni : Syll. Alg., 

 IV, p. 1196. 



(for other references, see : De Toni, I.e.) 



In Algae Novara, p. 91, GrunoW has noted a difficulty of 

 distinguishing the three species, Dasya collabens H. et H., D. 

 frutescens Hakv. and D. elongata Sond. from one another. 

 The specimens of these species in the Agardhian Herbarium 

 are indeed inseparable in the external appearances, more so 

 as D. elongata Sond is represented b}' various forms. Taking 

 Harvey's Australian Algae No. 202, as a reliable representative 

 of the species, I find Kutzixg's Tab. I'hvc, XIV, Taf. 66, fig. 

 a-c, satisfactorily agreeing with it. It may be distinguished 

 from I), frutescens IIarv. by having the ramclli widely furcated, 

 robust, and not attenuating at the apices ; and from D. col- 

 labens II. et 11. by the " ocellated " apices of the branchlets. 



Locality. Xon (Xou Fish. School, No 10), Kashiwazaki (M. 

 Nakamura, Xos. 150, 1 fiO), Echigo Prov. 



Distribution. Australia. 



