55 



PL. LXV, Fig. 1-6. Fig. 1 : carpogonial branch; c, auxiliary 

 cells;/, pedicel cell, 4 ^. Fig. 2 : carpogonial branch and auxiliary 

 cell-branch, a; c, auxiliary cell in the carpogonial branch, 4 J. Fig. 

 3 : ooblastema filaments f, f, produced from fused cell of the 

 carpogonium and auxiliary cells, 3 J. Fig. 4 : auxiliary-cell branch, 

 a, united with ooblastema filaments,/ 3 j. Fig 5: longitudinal 

 section of a young cystocarp, with gonimolobes arising from fused 

 auxiliary cells, a, and the remaining portion of the auxiliary-cell 

 branch coming into contact with vegetative cells, ". Fig. Q: lon- 

 gitudinal section of a ripened cystocarp; s, placenlal cell, 3 ^. 



Hyalosiphonia frig. 

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