35 



Contributions to the Knowledge of the Marine 

 Alga of Japan, III, 



{Continued from p. 10.) 



By 

 K. Okamura, BigakuhdlmsH. 



With PI II. 



Amansia japonica (Holmes). Fig. 21-22. 



Syn. Amansia multifida var. japonica. Holmes ' New mar. Alg. 

 Japan no. 8 in Journ. Linn. Soc. Vol.XXXT. 



I have no doubt that the species from Enoshima collected hy Mr. 

 Okubo and referred to Amansia multifida by Mr. Holmes as its new 

 variety is this plant ; for I believe there can not be found any other 

 Amansia in that locality. But the result of my own observations leads 

 me to regard this plant as a new species. I shall state my reason after 

 giving a general description of the plant. 



Description : Plant high and caulescent, 10-20 cm. in hight, including 

 the stem. Stem subcylindrical, arising from an expanded circular disc 

 (often 1.5 cm. broad), sparingly branched, 3-12 cm. high, about 3 mm. in 

 diameter. Frond arising subfascial! ately from the ends or sides of 



branches, flat, linear, 2-3 times distichously pinnate, 7-10 cm. high, 

 3-5 mm. broad in the broadest parts, a little narrowed at the basal 

 portion. Pinnae and pinnulae alternate or scattered, often a few 



arranged along one side, patent with acute axils, obtuse and inrolled at 

 the apex. Midrib passing through the frond, not furnished with proliferations. 

 It becomes thickened below by cortications and as the frond grows in age, 

 the lower portion gradually passes to the stem. Stichidia, transformed 

 from marginal pinnulae, linear, tapering towards borth ends and inrolled 

 at the apex. Colour vinous-red. 



