9 



Growing endophytic in the thallus of Nemalion Schrammi 

 (Cr.) Borgs, was found a green alga which seems to come very- 

 near to, most probably being identical with Blastopkijsa rhi- 

 zopus Rke. 



Quite in agreement with the description of Reinke the 

 large cells of our plant have a very variable shape and from 

 these long, colourless, rhizoid- 

 like fdaments grow out. Upon 

 most of the cells we fmd a 

 single hair or most often a 

 bunch of several hairs up to 

 5 — 7 or more together. In 

 Reinke's plant the hairs were 

 a little swollen at the base 

 like an onion, in my plant 

 such a swelling was most 

 often not present at all, only 

 seldom a lesser thickening 

 could be found. The wall- 

 plasma was granular and 

 several pyrenoids occurred in 

 each cell, but the chromato- 

 phore itself was indistinct in 

 most of the cells; a few cells 

 showed traces of its division 

 in the characteristic mode 

 of 5 — 6 edged plates as found 

 in Blastophysa rhizopiis and 

 in the other known species, 

 Bl. arhiza Wille and Bl. poh/- 

 morpha Kjellm. 



Any division of the cells 

 was not found, nor formation 

 of zoospores. 



Fig. 2. Blaslophysu rJiizopm like. 

 (About 125 : 1). 



Ever if our plant as mentioned above shows some few differ- 

 ences from Reinke's description, on the other hand I fmd these 

 so small and the plant upon the whole so variable, that I think 

 it most correct to refer it to Blastophysa rhizopus Rke. 



Only found once in Nemalion Schrammi, collected in the month of 

 February on the south coast of St. Croix: at Long Point. 

 Geogr. Distrib. Europe, St. Croix. 



