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On examining my large material of this interesting plant I 

 have arrived at the result that, even if it is in several regards 

 nearly related to Valonia, it nevertheless shows important differ- 

 ences approaching it to several other genera e. g. Apjohnia, Sipho- 

 nocladus etc., for which reason I think it most suitable to consider 

 it as representing a new genus. 



Before pointing out the ways in which it shows likeness with 

 and differences from the above-mentioned genera, I shall give a 

 description of the plant. As is the case with so many related 



sometimes even a little swollen, uppermost end the clavate stalk 

 bears a bundle of branches up to a dozen or more (fig. 10). These 

 branches are quite like the mother-cell, clavate, thinnest at their 

 base. Here, in any case when they grow older, we find a single 

 swelling (fig. \\.b,c). The branches are separated by an often 

 somewhat concave wall from the mother cell. In their upper end 

 these branches again are ramified quite in the same way and this 

 very regular ramification takes place several times, with the result 

 that the plant gets a nice candelabrum-like appearance (fig. 10). 



forms our plant when young 

 consists of a single clavate 

 cell forming the basal stalk 

 of the older plant. This at 

 its base is fixed to the 

 ground by irregularly rami- 

 fied and septated rhizoids 

 (fig. 1 1 a). The wall of the 



Fig. 10. Ernodesmis verticillata (Kütz.). 



Part of a plant. About 4 : 1. 



cells in the rhizoids is thick 

 and much starch is found 

 in the cells. Also the wall 

 in the stalk itself, in any 

 case in older plants, is 

 rather thick in its lower 

 part and here some annular 

 corrugations occur , most 

 strongly developed lower- 

 most (fig. 11 a), leaving only 

 a small passage open in the 

 middle of the cell. 



In its broadly rounded, 



