July, 1917.3 K. YENDO:— NOTES ON ALGAE NEW TO JAPAN. VII. 205 



almost black in colour, irregularly dichotomously divided, with 

 linear, parallel segments. The breadth of segments hardly 

 exceeds 5 mm in the largest one, and the final segments are 

 about 1.5 mm wide with rounded apices. The basal segment 

 tapers downwards into a short but robust stem. Several, 

 large and small, ascending segments are found proliferating 

 from lower part of the basal segment. 



Although I identify our specimen with the present species, 

 after comparing it with the t\ r pe at Lund, I have no less 

 doubt about the validity of the species. The type contains but 

 a few specimens from the Arabian Sea and from Amoy, South 

 China. If a good number of specimens had been obtained, 

 they may very likely represent a state of G. corticata J. Ac 

 which itself is very variable in form. 



Locality. Bonin Islands (T. Arima, No. 10). 



Distribution. Arabian Sea: South China. 



Champia zonata J Ag. 



Epicris, p. 306.— De Toni : Syll. Alg. IV, p. 502. 

 = Lomcntarin zonata J. Ag. Spec. Alg. IT, p. 7.°>0. 



The plant has an outward appearance of C. parvula J. Ac 

 in size and ramification ol frond, hut at once distinguishable 

 from the latter by having the artieuli hall as narrow as 

 diameter. The dense tetrasporangia in the artieuli, often 

 giving a ZOnate aspect to a branch, may not be passed over 

 lor its specific distinction though not of much importance. The 

 frond is light crimson purple when fresh and is beautifully 

 iridescent in tin- water. The texture is thin and membran- 

 ous, and the specimens adhere firmly on mounting paper on 

 drying. 



J. Aoakiui mentions C. ccvlonica IIarv. to he nearly 

 related to this species. Its co-(vpe in the Agardhian ller 



barium and the type at Dublin, however, give no support to 



his remark. It has rather a dose affinity with C. COtnptessa 

 IIakv. and not with tin ore-cut. 



