170 



Fig. 88. 



Farcellariu /'astigiuta. Seclion of young cy- 

 slocarp. At right several carpogonia. s, spo- 

 rogenous filaments. The cells of the young 

 cystocarp contain minute starch grains while 

 those of the surrounding cells are much 

 larger. August. (200:1). 



I have also in the same specimens observed the 

 produclion of small cells at the under end of the 

 large cells of the inner cortex, resembling the forma- 

 tion of secondary pits in the Rhodomelacese, but 

 what their significance may be I do not know. 

 The cortical cells situated outside the auxiliary 

 cells have richer contents and slain deeper with 

 h;ematoxyline than the others, forming thus a 

 darker stripe towards the surface (fig. 86 B). The 

 ripe cystocarp appears as a globular heap of car- 

 pospore cells, grouped around the auxiliary cell 

 or containing in the centre also a few other sterile 

 cells. The particular gonimolohes are usually not 

 distinguishable. At the periphery of tlie cystocarp 

 some long cells are frequently found foiuning an 

 incomplete envelope around it, as shown by Are- 

 SCHOUG and Caspary, 11. cc. At the time of ripe- 

 ning a pore is formed in the cortex through which 

 the spores are exhausted. This pore arises by 

 destruction of the cells of the darker stripe mentioned above. The fructiferous part 

 of the female fronds is more or less inflated, almost as in the sporangia-bearing 

 ones, but the upper part of the fronds frequently remains sterile; this part may be 

 1 to 2 cm long and branched (fig. 83 C). 



Germinating spores of what must be supposed to be Fiircellaria fasUgiata are 

 frequently met with on various Algae, as Delesseria, Phijllophora a. o. They are at 

 first hemispherical, and are divided by rather regular anticlinal and periclinal walls 



without changing form, but increasing 

 in size (fig. 89 A). I^ater on, a cylindric 

 upright shoot of the typical structure 

 is produced from this hemispherical 

 body, the shoot being a little narrower 

 as the basal part (fig. 89 B). These 

 shoots later branch and produce rhi- 

 zomes at their base. 



This Alga is one of the com- 

 monest and most widely distributed 

 in the Danish waters. It attains its 

 highest degree of development in the 

 Kattegat and the Belts, where it be- 

 Pig 89. comes up to 28 cm high. In the 



Furcellarla fastigiata. ^, germinating spores, seen from above western Baltic it attains a length of 

 and from the side. B, older stage showing a cvlindrie shoot i i ¥ i 



growing out from the hemispherial body. 24,5 cm, whcrcas at Bornhohu 1 have 



