― 211 — 



'cell and the two neighboring cells become enveloped in an especially 

 thick layer of mucus as shown in tig. 7-8. 



An ooblastema hlanicnt after havin<j fused with an auxiliary cell 

 •again travels far more distance, by simple prolongation or by branch- 

 in p^, to enter into union \vkh still other ones (fi^^. 6-9). At tlie place 

 where it comes in lusion with an auxiliary cell, spores are soon pro- 

 duced (ficr. 8) ； and in rarer cases they are formed in the ooblastema 

 filament at some distances from the auxiliary cell already acted upon 



(fig- 9). 



Ill all the articulations of o-oniinoblastic filaments, carpospores ar ひ 

 formed in succession lornilno' a few nucleoli which are ap^grep-ated 

 into a large pdobular or sli^Witly reniform mass. When the carjjo- 

 :spores are set free the wall of cells in which they were lodg*ed appear 

 like inucilasfinous network. • 



Spores soon o-crininate often witnin the mother body even staying 

 in cystocarp. After the division of spore as it is illustrated in ti!7. 14, 

 irrep^ularly branched filamentous embryos are formed which branching 

 more and more form an ag-o-ref^'ated mass from which numerous 

 elongated し ranchin 〔丫 filaments are emitted on all sides (fio-. 16). 

 Plant of this embryonal stage soon developes into a young frond. 



Remarks •• The present plant", which ag-rees in the character of 

 auxiliary cell with D. coccinea (Ay^.) Crouan and more especially with 

 D. ひ 一 asm II owe, is very much closely related to the latter in 

 having the highly specialized auxiliary cell. It, however, ditters from 

 that species in havini:^- subpinnate ramification of the peripheral 

 -, filaments and in the subdichotomous ramification of frond. 



PL 入 LI. 了. 1 : frond ot Diidresnaya japonica Okam. sp. 

 Tiov.， 十， —— Fig. 2 : cross-section of frond, - — Ficr. 3: axial cells, a, ひ、 

 with verticillate branches ； r, r, rhizoids ； 



