282 K. YENDO. 



peripheral cells at these points, which raises the assimilators 

 above the ordinary level. 



Unilocular sporangia occur near the base of the assimilators 

 occupying the position of a lateral ramulet. They are roundish 

 oval in shape and full of chromoplasts (Fig. 17). Plurilocular 

 sporangia are formed by the successive divisions of the cells of 

 each assimilator except the upper ones. Each cell generates 

 16 — 32 gametes (?) (Fig. 16). Both sorts of sporangia are borne 

 on the separate individuals. The plants bearing the unilocular 

 sporangia are generally smaller in size and have the assimilators 

 shorter than the others. 



The manuscript name of this species has been mentioned 

 in my former paper, 1 in referring to the plurilocular sporangia 

 of Chordaria filiformis Yendo. The plurilocular sporangia of 

 Chordaria are now known more fully than before, and agree in 

 their essential characters in three species, viz. C. abietina Rupr., 

 C. filiformis Yendo, and the species under discussion. 



The present plant has some resemblance in its external 

 appearance to Ruprechtiella filiformis Yendo, from which, 

 however, it may be at once distinguished by the presence of the 

 verrucose processes, the larger diameter of the frond, and the oc- 

 currence of the two sorts of sporangia in the separate individuals. 

 A certain robust form of Scytosiphon lomentarius J. Ag. is also 

 liable to be mistaken for this species, before the internal struc- 

 ture has been examined. 



As far as I can gather, there is no described species 

 agreeing with ours. The new specific name is after Captain 

 S. Gunji who first settled on Shimushu Island , the most 

 northerly islet of the Kurile Islands. 



1 Travaux du Musée Botanique de l'Académie Impériale des Sciences de 

 St.-Pétersbourg. Livr. X., p. 120. 1913. 



