plant, and may "be identified b;- the a"brupt terminations of 

 the filaiaents (fig. 1). It rarely becomes more than 4 

 centimeters high. The female plant is more loosely tufted 

 than the male, and reaches a much larger size, becoming 12 

 to 15 centimeters high. The cystocarps form deep red dots 

 at the sides of the nodes (fig). 2), The filaments of the 

 female plant do not end abruptly, but become gradua.lly 

 smaller tov/ard their tips (fig. 3). The tetrasporic plant 

 is more slender the^n the female and to the eye more nearly 

 like it than the itiale. It may be distinguished by the 

 v/horls of tetraspores, which form complete rings at the 

 nodes (fig. 4). The tetrasporic plant, lilce the sexual 

 individuals, sometimes produces reproductive organs v/hen 

 consisting of but 10-20 cells and ha,ving a height of less 

 than half a centimeter. 



One plant was seen m which a few antheridial branches 

 occurred, while the majority of the filaments bore numerous 

 procarps and cystocarps. In another case, most of the 

 branches produced antheridia, but a considerable number 

 bore at the nodes rings of cells resembling in all partic- 

 xxlars tetraspore mother cells, with the involucral rays 

 characteristic of the tetrasporic sorus. These tetraspore- 

 lilce structures are described in detail on pages 77- T'^. 



