424 



with reference to which he writes 1 : — »When several such half 

 intercalary sporangia occur in a row at the apex of an assimilative 

 filament then they apparently form one single ramified sporangium. 

 The separate sporangia of which this system is composed ripen 

 in the meantime in basipetal succession and are emptied separately«. 

 Thus, in this point these two piants exactly resemble one another, 

 but otherwise, when examined more closely they pro ve to differ 

 a good deal. 



This plant has been found on exposed coasts as an epiphyte 

 on Himanthalia lorea as mentioned above. It bore plurilocular and 

 unilocular sporangia in June. 



Found only on Syd.: Vaags Ejde (!). 



100. M. færoense nov. spec. 



Another Myrionema, which I assume to be new to science, oc- 

 curred on Rhodymenia palmata from Thorshavn associated with 

 Myrionema globosum. Professor Sauvageau to whom I sent some 

 preparations also said that judging from the latter he did not know 

 the plant. 



Fig. 79 represents some fragments of the plant. The latter has 

 a basal disc (fig. 79, g) composed of a single layer of cells whence 

 spring erect, branching filaments. The basal disc, which has a 

 marginal growth, has in the centre a compact layer of cells, in 

 which the separate filaments can, however, be clearly traced, while 

 along the margin the filaments are more or less loosely connected. 

 The cells in the basal disc are sometimes longer, as much as twice 

 as long as broad, sometimes almost square. The erect filaments 

 arise from the cells and are either simple or ramified. The branch- 

 less filaments bear a solitary terminal plurilocular sporangium (fig. 

 79, c); the ramified filaments start at the base with a shorter or 

 longer naked part and then often have a fairly large number of 

 branchlets each terminating in a sporangium. The branchlets 

 shorten towards the apex of the filaments, being composed here 

 of one cell only, and are rarely re-branched, as e. g. is the case 

 with those shown in fig. 78, a. I have only found plurilocular 

 sporangia. Their form is oblong-ovate-elliptic and they are about 

 40 — 80 fx long and 11 — 15 /< broad. When the sporangium is 



1 »Naar flere saadanne lialvt interkalære sporangier forekommer paa rad i 

 spidsen af et assimilationsskud, kan de tilsammen tilsyneladende danne et eneste, 

 forgrenet sporangium (fig. 4 — 5). De enkelte sporangier, hvoraf dette system bestaar, 

 modnes imidlertid i basipetal rækkefølge og udtømmes hver for sig.« 



