2S0 



= Grateloupm fiUcina Okam. Alg. Jap. Exsic. No. 32. 



= Gratelovpia subpectinata Holmes, Scot. Bot. Rev. Vol. I. PI. I. 



= Grateloupia 6Iicina ^ ramentacea Mont, in litt. Herb. Kcw Gard. 

 The specimen distributed by Okamura under Grateloupia 

 Mcina Ag. as Algae Japonicee Exsiccate No. 32, in the copy in 

 my possession, seemed to me to have widely differed from the 

 Atlantic forms of the species. It was more likely referrable to 

 Grateloupia prolongata J. Ag. after comparing with the de- 

 scription in Fpicris, I.e., and with the figures in Tab. Phyc, 

 I.e. Being, however, no less uncertain of its identity, I laid it 

 aside with question mark reserving for future study. 



While studying in the Agardhian Herbarium at Lund, I 

 found the originals of G. prolongata J. Ag., some of which 

 agreed satisfactorily with Okamura's specimen. There is also 

 Okamura's Exsiccata kept in the Herbarium and No. 32 is 

 represented by a specimen quite similar with that in my pos- 

 session. J. Agardh seems to have disproved the identification, 

 as he has kept it separate from the other specimens of G. 

 Mcina, but without any specific name on it. Curious to say, 

 a similar specimen from Japan, sent from Farlow to him, is 

 determined by himself as G. prolongata J. Ag. 



The original specimens in the Agardhian Herbarium are not 

 uniform in their external appearance. The typical form, which 

 may be represented by the illustration given by Kutzing in 

 Tab. Phyc, I.e., is fairly common on our coast and is charac- 

 terized by having the principal segments fleshy and irregularly 

 bullated, and twisted here and there. When fully grown, the 

 total height of plant may attain 25-30 cm with the principal 

 segments 4-5 mm in breadth. The irregularly pinnate proli- 

 ferations may be .6-8 cm in length and often beset with small 

 pinnules on their margins. 



Some of the originals have the principal segments simple 

 or less branching, smooth and even surface, and not at all 

 twistmg. This form coincides with what Holmes described 

 recently as G. subpectinata. Still others have the principal 

 segments lineari-cuneate in shape with minor pinn« proliferat- 

 ing densely from the margins. 



