103 



some peculiar crooked branchlets were observed, mostly rising from the sporangia- 

 bearing branchlets, more rarely independently of these, and then usually given otf 

 from the lower end of the cells (fig. 33); in some cases they bear sporangia (fig. 33 A). 

 Sometimes they occur in great number on a branchlet, forming a short-stalked 

 capitulum (fig. 33/?). These 

 crooked filaments showed 

 rich , coloured contents ; 

 they must without doubt 

 be regarded as abnormal 

 formations. 



Besides the monospor- 

 angia tetrasporangia have 

 also been met with, but 

 only in one locality in the 

 North Sea (aF, 31 meters) 

 in August. The specimens 

 bore numerous , typical 



monosporangia and in 

 smaller number tetraspor- 

 angia , having a similar 

 position to the former. 

 The number of teti-aspor- 

 angia on one branchlet 



was frequently greater 

 than usual, but that was 

 also the fact for the mo- 

 nosporangia in these spe- 

 cimens. The tetrasporan- 

 gia were almost globular, 

 a little longer however 

 than broad, 25 — 26 //. long, 

 21—22 p. broad (fig. 32 D). 

 In one branchlet only one 

 sort of sporangia occurred, 

 but branchlets with mono- 

 sporangia were found at 

 a little distance from those 

 with tetrasporangia on the same plant, 

 sporangia. 



Some specimens growing on Flustra foliacea dredged in the Skagerak N.W. of 

 Hirshals in May (no. 7109) may be mentioned here, as they are somewhat different 

 in the smaller size of the sporangia and the more irregular position of the spor- 



iMg. 32. 



Chaniransia%Jhnrelii ar/ama. A— C from 7AJ. 26.'5:;i, A from the lower, B 

 IVnm the upper pari of the plant. C, hranch with sporangia, partly 2 on each 

 cell. D, from aF. :!4.5:1, branchlet with tetrasporangia. The pyrenoids have 

 been drawn in some of the cells. 



Some plants bore only monos]jorous 



