151 - 



Rhodomela subfusca (Woodw.) c. Ag. 



Mom. Jap. : Ito-fujiinatsn. 

 PL. CLXXXVI ; PL. CLXXXVII, Fig. 1-13. 



Rhodomelu snbfusco (Woodw.) C. Ag. Sp. I, p. 378 ; J. Ag. Sp. 

 Alg. II, p. 883; Harv. Phyc. Brit. tab. 264; Falkenb. Rhodom. p. 593, 

 tab. XI, f. 2-17; Kjellm. Alg. Arct. Sea p. 113; Borgesen The Mar. 

 Alg. of the Faeroes, 1902, p. 375; Hauck Meeresal. p. 217, f. 94; 

 Okam. Synop., || ^ $110 ^3 jjg (1st. edit.), p. 66. I''uscaria temiissima 

 Rupr. Alg. Ochot. p. 221, tab. 10. 1'itcits subfuscus Woodow., Turn. 

 Fuci tab. 10. Rhoilomela lycofrodioides (L.) Ag., Okam. Synop., || >fc v& 

 ffi&% (2nd. edit.), p. 81. 



Many fronds rising from a common disc, 13-20 cm. high, 3-4 times 

 pinnately branched in more or less regular manner from the lower 

 portion of trond. Fronds are filiform, in some very slender, in others 

 more thick, and in perennial older ones the lower portion of frond 

 often becomes firm and stem-like (PI... CLXXXVI, fig. 1). Branches are 

 patent, in some almost straight, in others slightly flexuose, the middle ones 

 in general the longest and are more or less densely covered with ramuli 

 Ramuli simple or often furnished with few pinnate ramelli toward their 

 apices; they are spirally arranged, subulate and incurved (fig. 2 and 4\ 

 in older ones often recurved (fig. 1). They are 10-12 mm. long in 

 longer ones (fig 2\ 0.5-1 mm. in shorter ones (fig. 3). Tetraspores are 

 formed in ramuli which become toruloso-prominent in maturing (PI. 

 CLXXXVII, fig. 9-10) ; in some fronds a small branch bearing tetra- 

 sporic ramuli becomes stunted appearing like fasciculately arising from 

 the axil of a ramulus (fig. 8). Aiitherhlict oblong, formed on 



