173 



way and they assume an appearence somewhat dichotomous and 

 corymbose. Mode of growth is monopodial ; but as the elongation 

 of an apical growing axis is slower than that of lateral branches 

 standing next to the axis, it appears as if the plant grows in the 

 sympodial manner. Near the growing portions dichotomous fibrillae 

 (" Haarblattern ") are emitted from flattish surfaces. Pinnulae and 

 b.isal portions of pinnellae are more or less thickly corticated only 

 leaving the upper portions naked for a short distance, wheie 

 9-1 1 pericentral cells are observed in the cross-section. Branches 

 stand almost free and pinnulae and pinnellae arise at the intervals 

 of mostly three articulations. Antherozoids and procarps aie 

 produced on the hairs arising near the growing portion of branches 

 Antheridia are lanceolate in outline. Hairs which are transformed in- 

 to antheridia are simple, rarely once forked and very rarely the 

 terminal portion of an anthericlium elongates into a hair. Procarps are 

 formed in the segment next above the basal articulation. Cystocarps 

 are ovate or suburceolate with a wide opening. Pericarp is formed 

 of longitudinal rows of cells running from the base to top and the 

 rows are terminated with large cells which form the margin of the 



o o 



carpostome. Tetraspares are ripen in a single longitudinal row in 

 the upper joints of laciniae of pinnellae. Colour dark brownish red. 

 Substance soft and fleshy when recent, very much shrinked in drying. 

 When dried plant firmly adheres to paper. 



Among the materials I have obtained a very young frond which 

 I believe surely to be the young frond of the present plant just 

 germinated. A glance at fig. 19 will need no further description. 



Hab : On the fronds of Sargassum and others growing between 

 tide marks ; Shirahama (Prov. Boshyu), Cape Inubo (Prov. Shimosa), 

 Kami-shima (Prov. Shima) ; Enoshima (Prov. Sagami). Fruits in 

 eary summer. 



