36 



Remarks. This plant as in Dasya pidclixa Okom. belongs to the 

 subgenus Stichocarjpus, from the hitherto known members of which it 

 differs in having the fewest pericentral cells. It is related with 

 I). pulchra Okam in many points, differing in the mode of ramification 

 and appearence. Throughly ecorticated, 4-siphonous, compressed frond, 

 ramification of secondary pinnae, and stichidia are common to both 

 species. In D. pulchra, lower and upper secondary pinnae upon one 

 branch are almost equal in length, while in D. notoensis Okam. the 

 upper pinnae are decompounded ; moreover in the former, pinnae have 

 3-4 articulations intervened, while in the latter 2-3, though the number 

 differs somewhat in the two species. 



Ccramium paniculatum sp. nov. 



Diagnosis. Fronds tufted, attaching to substratum by root- 

 fibres, capillary, erect, subdichotomo-alternatety decompound, branching 

 in every direction in paniculate manner. Branches short, patent 

 with similarly arranged, widely forcipated, patent ramuli armed at 

 each external node with a subulate 3-4 ceiled spines. Tetraspores mostly 

 verticillate, in a single transverse row prominent and bracteated. 

 Articulations shorter than the diameter below, 1J-2J times longer in 

 the median portion, gradually becoming shorter above. Node thickly 

 corticated, subequal or very slightly constricted, hyaline at interstices. 



Hah. et Log. A single specimen of this plant growing on a 

 species of Corallina has been sent to me by Mr. K. Nemoto who 

 collected it at Kamahara, in the province Iwaki. It seems to grow 

 perhaps in sublitoral region. 



Description. Fronds capillary, ca, 3 cm high, 132-198 }i thick, 

 caespitose, subdichotomo-alternately branched, erecto-patent, shooting 

 forth in every direction lesser sorts of branches. The basal portion of 

 frond lying on substratum emits from nodes monosiphonous root-fibres 

 which, are mostly simple or distantly branched, ending in a blunt 

 apex or expanding into a small conical disc. Branches short, patent, 

 often almost horizontal, of subequal length for the most part, becoming 



