



consequently a cross-section of frond presents a parenchx matie appearence. 



The state of things similar to that described above is seen in the 

 structure of Gloiothamnion Srhnutuauunt Rbd. This -vims was established 

 by Mr. Reinbold™ in 1895, who distinguished that genus h\ -die b-ondere 

 Structur des Thallus, speciell der Rinde, welche eine seharfe Scheidung in 

 zAvei deutlich gesonderte Schichteu, wie das bei Microcladia der Fall, nicht 

 erkennen liisst." In his illustration there is no sharp distinction of cortical 

 and iutra-cortical layers. lint according to my study of the same plant, 

 the cortical layer is separated from the central axis by a lew cells of an 

 iutra-cortical layer. In a cross-section there are six cells surrounding the 

 central axis. In cutting a longitudinal section from a thicker portion of 

 frond, we find 2-3 celled branches arising verticillately and obliquely from 

 the axis. From the cells of those branches, cortical cells are derived directly 

 or indirectly. Those branches arise from the central axis at the same level 

 with no marked difference in size of cells, as it is the case in Carpobfbfv- 

 pharis jlaccida. Judging from my study, I came to the conclusion that 

 Mr. Reinbold's expression above quoted and his illustrations given, would 

 have perhaps been done from the study either of a younger or of a nar- 

 rower frond; because, the section of a very narrow portion of frond really 

 presents an apparence similar to that illustrated in his figures 3 and 4. 

 Even in such sections (made from a branch having the thickness of 130 /i) 

 a few intra-cortical cells can be made out, only very much smaller and more 

 closely placed beneath or almost among cortical cells. 



of frond, habit of branches and robustness of ramilication . as Mr. Kcinbold 

 has remarked for those growing on Chondrus. He has illustrated the 

 narrowest forms of frond as the type of this species. Plants having such 

 forms are slenderer and subcylindrical (attaining the diameter of about 

 130-180 //), and have a less robust ramification. Even in those, the upper 

 branches, either sterile or fructiferous, are more or less compressed. A very 

 differently appearing plants have been collected by me at Boshu, which 



fronds branching in a close pinnate. They seemed to me at Brst to be a 

 species different from Gloiothamnion Schmiizianum Rbd. But, the basal 



portion of those plants are subterete and they grow in the same place 

 together with the typical forms. In such extraordinary forms, the structure 

 of frond like that described above is quite manifest. 



0) Reinbold in Hedwigia XXXIV, Taf. III. ( 1895).-Pnauzenfiun. Alg. p. 5U2.-Kein- 



boldiella Schmitziana (Reinb.) De Toni Phye. Jap. Nov. p. 35. (1895). 



