96 



Fig. 23. 



Clianlransia haUandica iJ. brevior. A and B Iroiii VT. .1 with sporaiigiii, B with 

 se\u:il ni jj;inis and a cystocarp. — C and I) i'rtim \\V. , C willi s])oi'aii}iia, ])arlly 

 slalUeil, D with spiiraiinia and aiillieridia. 



tVoni Ihe cylindric form (fig. 23 C). These plants are lower than the main form 

 and usually branched from the base, while the main form is most often without 



branches below. In the 

 specimens from VT the 

 sporangia were almost al- 

 ways sessile, alternate, se- 

 cund or opposite (fig. 23 

 A) , while in the speci- 

 mens from KG they were 

 often stalked (fig. 23 C). 

 This form may be named 

 f. brevior. 



The specimens just 

 described are only slight- 

 ly different from others 

 agreeing with Kylin's Ch. 

 parvula. Fig. 25 shows 

 such a specimen, the fila- 

 ments of which are 5 — 7 fi. 

 thick and the cells about 

 twice as long as broad; the sporangia, however, were somewhat larger than indi- 

 cated by Kylin, namely (10— ) 12 13 (—14) /i long, 6— 8 (— 9) broad. The basal 

 cell was (10 — ) 12 — 13 ( — 15) n in diameter. Some 

 specimens growing on the frond of Porphyra iimbi- 

 Ucalis on the mole of Frederikshavn (fig. 26) may 

 also be referred here, though they were not strongly 

 ramified in one ])lane; ihey bore numerous spor- 

 angia, most often opposite, sometimes even three in 

 one article. The axile chromatophore is very distinct 

 in the figures which have been drawn after speci- 

 mens preserved in alcohol. The last-named speci- 

 mens as well as those from EM (fig. 25) were only 

 provided with sporangia; on the other hand, spe- 

 cimens from BH (fig. 24) had also sexual organs. 

 Fig. 24 B fully agrees otherwise with Kylin's figures, 

 w hile fig. 24 A might perhaps be better referred to ' 

 f. brevior, but these plants grew side by side and 

 were connected by transitional forms. A very re- 

 duced plant provided with all kinds of organs of Fi^;. 24. 



,,. ., •r.«^j/-.T. i- Chaiitransia hallandica Y. paiuiila. From 



reproduction is shown in fig. 24 C. It seems not im- ,5,, ^ ^^ jj,^ ^,„, ..,],e,n.,te spor- 

 probable that the small cells shown in Kylin's fig. an-ia, tj with sporangia and anthendia, c, 



dwarfed plant with sporangium and sexual 



9/?, i (1906) may have been antheridia. organs. :«io:i. 



