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The shoot is composed of a distinctly articulated polysiphonous 

 axis with four pericentral cells, coated internally with many layers 

 of larger cells and externally with minute polygonal cellules. 

 Mode of growth of shoot is monopodial with an obliquely articulated 

 apical cell whose successive articulations soon give rise to pecti- 

 nated " Haarblattern." 



Tetraspores are formed in the swollen potion of simple or 

 branched " Langtriebe " of the ultimate order, which are more or 

 less differenciated into stichidia and are provided with simple 

 " Haarblattern." There are found two of them in each articula- 

 tion (rarely one) arranged in such a way that every pair makes 

 cross-way with that of the next. The surface of sporiferous por- 

 tion is uneven, and owing to its slightly twisting, " Haarblattern " 

 appear as if arising from all sides. The procarp is produced 

 near the apical portion of growing shoot, being formed' single on 

 each " Haarblatt." It is developed from the lowest basal cell or 

 from that next to it along the upper side of the fertile " Haar- 

 blattern '， which are generally simple ； but a few laciniae are 

 sometimes present. The cystocarps are globular, almost sessile 

 or furnished with a very short apparent pedicel, provided with 

 a slightly prominent carpostome and sometimes carry the remnant 

 of the terminal portion of the rachis at their bases. Colour a 

 bright red. Substance soft-cartilaginous and the frond imperfectly 

 adheres to paper in drying. 



The present alga stands in the system near LopJiothalia 

 and Pteronia. From the generic character of Pteronia given 

 by Prof. Falkenberg in Engl. u. Prantl's Natiirlichen Pflanzen- 

 familien, I. Theil, 2, p. 452, we learn that the frond is compressed 

 and branched out on both sides, whose " Langspross " is furnished 

 with simple monosiphonous " Haarbldtern which alternate in two 



