196 THE BOTANICAL MAGAZINE. [Vol. xxxi. No. 367. 



My specimens agree with Greville's description in every 

 detail except the point that the short axial stem is muricated. 

 This difference, however, requires a careful observation as the 

 dropped scars of the principal branches at the basal part of 

 frond may often give a muricated appearance. I have no 

 means at present to ascertain how it is in the original specimen. 

 The receptacular cluster delineated by Greville seem to me 

 not fully developed one, since each receptacle in mine is much 

 longer than he has figured, measuring up to 6-7 mm. 



The present plant is characterized by having linear spathu- 

 late leaves with crispated, sharply spinulated margins. The 

 bases of leaves are more or less oblique and the petioles 

 short. When receptacles have fully developed the receptacular 

 cluster shows the character of the Racemosae in some measure. 

 A specimen from Koshikijima has receptacles provided with 

 sparing but sharp spinules, showing a tendency to approach 

 to the Acanthocarpicae. 



A sterile specimen of Sargassum from Hiuga Prov. which I 

 have ever identified with 5. microcystum J. Ag. appears to me, 

 after consulting its type, better to apply to the present species. 

 The two species have indeed a close resemblance, but the former 

 has spinulated receptacles and smaller and more numerous 

 vesicles. 



Reinbold observes some affinity between this species and 

 S. Binderi Sond. The present species has the leaves much 

 finelj- spinulated and crispated, which is not the case in the 

 latter. 



Localit}-. Amakusa, Higo Prov.(!); Koshikijima, Satsuma 

 Prov(!); Hiuga Prov.(!). 



Distribution. Chinese Sea; India; Philippine Islands; Java; 

 Borneo. 



Sargassum Sandei Rbld. 



In Weber van Bosse : Liste des Algues du Siboga, I, p. 158, 

 PI. IV. 



Last summer I had a favourable opportunity of observing 



