35 



simple or once forked. JStichidia lanceolate, equally tesselated with a 

 short polysiphonous pedicel. Articulations subequal as diameter, or 

 little shorter below. 



Hab. On stem of Sargassum growing between tide marks. 



Loc. This plant has been collected in April 1895 by myself at 

 Noto, a province along the coast of the Japan sea, and. at present 

 it is not known from any other locality. 



Description. Plants epiphytic on larger algae, many rising from 

 intricated lower portion, attaching to substratum by means of altered 

 pinnulae which arise from basal decumbent portion of frond. Frond 

 filiform, compressed, 3-4 cm high, ca. 210 ju thick below, attenuating 

 above to ca. 155 ij., 3-4 times alternately pinnate, distichous, with a 

 few main divisions. Main divisions alternately branch upward in 

 pinnate manner, with patent axils, assuming a somewhat pyramidal 

 outline and leave the lower portion branchless for longer or shorter 

 distances. The branchless portion of main branches is clothed with 

 short pinnae, rising at every 2nd or third node, which little elongate 

 above and pass to branch ; these pinna? correspond to those on the 

 upper branches. The upper branches or primary pinnae are also 

 furnished with secondary pinnae, of which the lower ones are shorter 

 and the upper ones are gradually compounded, that is the secondary 

 pinnae are converted to branchlets which are pinnated also in their 

 turn. The terminal portion of each branch or primary pinnae is some- 

 what level-topped, being corymbose in outline, and pinnae and pinnulae 

 of one branch overlap one another and also those of the next above. 

 Pinnae of every order branch dichotomo-alternately with patent axils ; 

 pinnulae monosiphonous, once or twice forked*, issuing at every second 

 node, subulate, those of upper branch is more flaccid than those below. 

 Stichidia linear-lanceolate with attenuated apex in adult ones, furnished 

 with 1-cell-long polysiphonous pedicel, appearing almost sessile. In 

 younger stichidia cells are arranged in regular transverse zones, com- 

 posed of cells of equal size; in the more advanced ones, tetraspores are 

 developed in verticillate manner, two appearing beneath regularly 

 arranged, subequal, cortical cells in surface view. Articulations are 

 almost broad as the diameter throught, being little shorter below, 

 throughly ecorticated with a clear dissepiment. Pericentral cells are 4> 

 3 appearing in surface view. Substance soft and flaccid, firmly adhering 

 to paper in drying. Color purplish-red. 



