204 THE BOTANICAL MAGAZINE. frol. xxxi, no. Mi 



is found on the top of the middle filament of a trichotomous 

 ramulet and measures 60-70 (x in diameter. The sporangium- 

 bearing filament is often reduced to a small roundish cell and 

 a sporangium sits apparently sessile at the axil of the two 

 filaments. 



The plant is generally purplish blue when alive, especially 

 when it grows on an exposed place. In the dried specimens 

 the natural colour often keeps slightly changed but more 

 frequently turns into a brownish purple. 



In Spec. Alg., I.e., J. Agardh referred to Callithamnion 

 purpuriferum, Harv., but mentioned it no more iu his Epicris. 

 I have a least doubt left in identifying our specimens with the 

 present species as taken by J. Agardh, but am in no less 

 hesitation to refer to Harvey's species. Harvey has been the 

 foremost authority of Wrangelia in his time as may be under- 

 stood from the fact that 19 species out of 25 of Wrangelia 

 have been described by him. He must have been well aware 

 about the distinction between Callithamnion and Wrangelia. 

 This view is much strengthened as I find on a specimen sheet 

 of the type of " Wrangelia purpurifera Harv." in the Trinity 

 College, Dublin, a brief sketch drawn by Harvey to show a 

 part of structure of his specimen. The sketch scarcely points 

 to any species of Wrangelia so far as I can refer to. 



Locality. Kaifu(!), Awoshima(I), Teradomari (R. Kob'a- 

 yashi, No. 5), Echigo Prov. ; Misaki, Sagami Prov.(!); Boshu 

 Prov. (F. Sugiaya); Izu Prov.(!). 



Distribution. Cape of Good Hope. 



Gracilaria lingula J. Ag. 



Mantissa Collect., p. 86. 



Among a collection of the Bonin Islands algae sent from 

 Mr. Arima to me, I found a specimen which accords very well 

 with the present species. The plant is comparable with Gracilaria 

 corticata J. Ag. but may be separated from it by various 

 points. The frond is thin but coreaceous, dark purple or 



