-.1 f. t 



H* 

 IS/ 



Tetrasporcs formed in the lacininae of tlie upper segment in one 

 longitudinal row. Colour vinoso-red. Substance membranaceous and 

 the plant does not adhere to paper in drying. 



Hab : on the frond of other algae, Noh (Prov. Echigo). 



The present plant has been identified by late Prof. Yendo 

 as Ptcrosiphonia parasitica Fkbg. It has a very close external 

 appearance of Ptcrosiphonia, but as the congenital nature of apical 

 portion of branches, especially of younger ones, tells its difference 

 from that genus, it should be better to put the plant in question 

 in Symphyodadia. 



Of all the species of Symphyodadia known in this country the 

 present plant stands very near by 6\ lincaris Okam. which differs 

 by having very much elongated fronds. With exception of the 

 difference of size the two plants resemble in having much separated 

 laciniae. On the other hand, the plant in question has an appear- 

 ance very closely resembling the narrower form of 5". marchanti- 

 oides (Harv.) Fkbg., from which however it differs in having 

 much separated laciniae. 



Taking into consideration that the water of the Japan Sea is 

 always a little colder than that of the Pacific of this country and 

 that the plant of one and the same species often takes much a 

 different form and appearance in the both waters, I am in doubt 

 whether the present plant is not a dwarf variety of S. lincaris 

 Okam. or a nar.ower form of S. marchantioidcs. But at present 

 I refer it provisionally as a new species. 



PI. CXCVI, fig, 7-9. Fig. 7 : two fronds of Symphyodadia 

 pennata Okam. from Noh, i. Fig. 8 : terminal segments of creep- 

 ing portion, ^. Fig. 9 : portion of frond, -*-. 



PL CXCVII, fig. 9-13: Fig. 9: potion of branch, ^. Fig. 

 10 : apical cells of congenital ramuli, 3 ^. Fig. 11 : tetrasporic 



