1 62 



Hab. : Ryukyu, Ogasawara-jima, Kashiwajima (Prov. Tosa), 

 Nagasaki. 



PL. CXXXVII. Fig. 1 : small frond of Dictyota spinulosa Harv., 

 -J-. Fig. 2-3 : upper segments bearing proliferations ; 2 : \ ; 3 : 

 -j-. Fig. 4: two proliferated segments, *-*-. Fig. 5: portion of 

 segments bearing antheridial sori, (a, a), hairs (//,) and proliferations ; 

 -f-. Fig. 6 : beginning of antheridial sorus, a, surrounded by enve- 

 lope, //, 1 ". Fig. 7: the same a little advanced; characters same 

 as fig. 6; i?-, Fig. 8: the same fully formed, ^p. Fig. 9: 

 antheridial sori viewed from above, i \~. Fig. 10 : segments bear- 

 ing tetraspores ; proliferations taken out of view magd. Fig. 11 : 

 portion of fig. 12 magd., *f-. Fig. 12: portion of fig 10 magd. 

 showing proliferations, -f-. Fig. 13 : tetraspores, 5 1 t . Fig. 14 : 

 beginning of hairs, 2 ~. 



Dictyota spinulosa Harv. 



u ?> & & a m /H- m* 



cxxxvii K. 



9 ^, 25-30 cm. 

 5-7 cm. -> US ? = 2fc f, 4i 



m &~ ifl it 



-^M 5-io mm. r J 7 ^ 

 r 2-3 mm. b t A', M -V 7 %k i& ^ ffi 



* b SI * ffi 



