272 



THE BOTANICAL MAGAZINE. 



Tokyo, Vol. XVII. PL VI. fig. 1, under Hedophyllutn spirale 

 Yesbo. 5) Alg. N, W. Araer. PI. 20, under Hed, subsessile 

 Setch. 



PosTELS and RurRECUT distinguished the plant into two 

 form^ and Areschoug into three. Kjellman added two more 

 to them, and Setchell and Gardner still one more. The 

 limitations of the formfe taken by these writers are not equal. 

 My observation on the stages of development of the plant on 

 the Shiraushu Island from the beginning of June till September 

 induces me to believe that these forra^e, provided that other 



