4' 



ever differs in having still darker colour, more thicker substance, erect 

 emarginate apices and hypodermal cells. In some fronds as 

 illustrated in PI. CXII, fig. 3 (from Cape Nomo) basal portions 

 are stupose for a distance of 4-5 cm. from the root. 



In the next place there is one which I took for f. implexa. 

 It has the frond of mediate size which has upper segments torted 

 and interwoven, being dissolved into slenderer branches from the 

 lower broader portions. In the specimens now before us such 

 fronds attain 6-1 1 cm. in height with the breadth of 2-3 mm. at 

 lower portions in dried specimens and tapering above into 0.3-1 

 mm. in breadth. Terminal segments are erect, obtuse and emar- 

 ginate as well as widely parted and more tapering. In one and 

 the same frond those different characters of terminal segments are 

 often observed as illustrated in PI. CXII, fig. 4-6. 



Lasty, there is still another form which has branches more or 

 less pinnately arranged. Of the plant of this form, there may be 

 distinguished some two variations. As I have illustrated in PI. 

 CXIII, frond has an appearence much differing from the typical 

 form having elongated and straight rachises on both sides of which 

 lateral dichotomous branches are pinnately arranged. These forms 

 which have broader segments are seen along the Pacific coast of 

 this country. Another one has more or less flexuose branches 

 having a flabellate outline, and of this form apical segments are 

 either blunt and emarginate or more acute and parted. Those forms 

 are mostly found along the coast of the Japan Sea and they have 

 narrow linear fronds. 



Of fructifications some remarks must be given about the 

 arrangement of sori of oospores and tetragonidia. The former are 

 equally scattered over both surfaces as minute dots except narrow 

 marginal portions, while the latter are produced forming an 



