102 



TJf.*-^ 1?:* ' IB 8Tr IS, -Y- 14 : 

 It jg * '" it ' -- ffi * * ? * jft ' ft Hd" 

 ** ^ tti ^ E, ^.-15: figjifi^, S A:. 



Rhabdonia robusta J. Ag. 



N'om. Jap. : Mirin. 



PL. CLXXIV. 



Rabdonia robttsta J. Ag. Sp. Alg. II. p. 355 ; Yendo, Notes on Alg. new 

 to Jnp. II, p. 273 (Bot. Mag. Tokyo, Vol. XXVIII. 1914, no. 333). Soli- 

 cria aastralis Hnrv. Phyc. Austr. pi. 149. 



Fronds solitary or a few tufted rising from a small scutate disc, at- 

 tenuating below into a short cylindrical stem, sooa dilating above to 

 broadly linear tereti-compressed main branches, 25-35 cm. long, 3-15 mm 

 broad, 2-3 times thickly branched in an alternate manner. Branches 

 cylindrical when young, inflato-tubulose, very much succulent and gelatinous 

 in the fresh state, soon compressed above, ending in blunt or pointed apices, 

 and vaguly narrowed here and there, with the bases of branchlets abruptly 

 very much constricted, S3 that all the segments droop down 38 the plant 

 is brought up above the water. Gystocarfis immersed or little prominent, 

 dispersed in the les:er sorts of branches. Colour reddish or yellowish 

 purple, accorJing to the age of plant. S'tbsUrr:e gelatino.;o-membranaceous, 

 vc-ry succulent, and firmly ndh'.'rcs to paper in drying. 



II<;b.i In deeper waters ; the Sagami Bay, Goto-Islands, Prov. Kishyu 

 :i-v1 Bosyu. 



