i8o 



Choiidria intricata Okam. n. sp.. 



Norn. Jap. : Motsnre-yuna. 

 PL. XCIX, Fig, 10-18. 



Fronds filiform, somewhat loosely intricated and coalesced to each 

 other, forming a globular mass, cylindrical or slightly compressed, 2-3 

 times vaguely branched in pinnate and subdistichous manner. Branch- 

 es patent, as a rule alternate, but here and there opposite and a 

 few secund ; they coalesce to each other by forming root-like attach- 

 ments mostly on apical portions of branches and are not able to be 

 detached without rupturing. Branches and branchlets not constricted 

 at bases, cylindncal, of subequal thickness on both ends and roundish 

 obtuse at apices. Pericentral cells are translucently visible in upper 

 and younger portions of branches through cortical cells which are 

 areolated with polygonal cells in surface view. Growing point is 

 placed in the hollow excavated on the top of branches and branchlets. 

 Fruits of both kinds unknown. Colour light flesh-red. Substance mem- 

 branaceous and the plant adheres to paper in drying. 



Hab : Washed ashore. Abura-tsubo and Enoshima (Prov. Saga- 

 mi). 



Remarks : New plant under subgenus Codochondria Falkenb. 



PL. XCIX. Fig. 10 : frond of Chondria intricata Okam. with 

 some branches set free,-j-. Fig. 11 : branch, ^~. Fig. 12 : ramulus 

 with papiliiform ramelli, ~. Fig. 13 : longitudinal section of a branch 

 showing the growing apex, ". Fig. 14- : longitudinal section of a 

 branch through the central axis showing the structure of frond, ? p. 

 Fig. 15 : cross-section of a little compressed portion of a branch, 

 "j 1 . Fig. 16: the same of a cylindrical portion of a branch, ^p. Fig. 

 17 : surface-view of the cortical layer, ^. -Fig. 18 ' adhesion of 

 branches with a root-like process, ^. 



