152 - 



J< Haarblattern " arising from the apices of ramuli. Cystocarps ovate 

 provided with a wide ostiole, shortly stipitate on the side of ramuli. 

 Colour dark or yellowish brown when fresh, turning to blackish in 

 drying. Substance soft in younger part, becoming firmer in older 

 portions and the plant imperfectly adheres to paper in drying. 



Hub. : On rocks between tide-marks, rather near the high tide in 

 the place where it is protected from the dashing of waves. Widely 

 distributed within the boundaries from the Kurile to Kyushyu. 



The specific determination of the species of Rliodoniela is very difficult 

 in Rh. siibfusca, virgata and lycopodioides, and there are some confusions 

 among them. To a certain extent I have followed Kjellman's definition 

 of the species, and many forms are met with in our specimens differing 

 in several minute characters chiefly according to their localities and they 

 may be separated in other days into some numbers of varieties. 



Plants illustrated in PL. CLXXXVI may be considered in some 

 measures as the representatives of forms of the plant in this country. 

 Of the two species of Rhodomela known in the boundaries the present 

 plant has a wide range of distribution ranging from Shimushu to Kyu- 

 shyu and as consequence there are many types of diffrent forms. Fig 

 4 represents the southern form and fig. 1, the northern ; fig. 3 may be 

 considered as weakly grown form as it is collected at Abashiri where 

 the coast is washed by a terminal branch of the warm current pouring 

 into the Ochotsk Sea. The form shown in fig. 2 which I have collected 

 at Muroran in the sumrnar has a very robust frond having a very 

 different appearance. 



PL. CLXXXVI. Fig. 1: plant from Shimushu Isl., bearing vernal 

 shoots just growing from the hiemal frond, \. Fig. 2: plant collected 

 at Muroran in summar, 1915, }. Fig. 3: plant from Abashiri in 

 summar, 1915, }-. Fig. 4 : summar form from Iwaizaki, -j- 



