VESICULIFERA. 195 



lias the greatest claim to be retained: a name, however, 

 founded in error. 



16. VESICULIFERA. 

 Char. Same as those of the family. 

 Derivation. From Vcsiada, a vesicle, and jfero, to bear. 



1. Vesiculifera princeps Ilass. 



Char. Filaments of the same diameter as those of V. cajnl- 

 laris. Cells about once and a half as long as broad. 

 Sporangia circidar, ■producing but a very slight inflation of 

 the fructiferous cell. 



Isogonium capillare Kiitz. Phyc. Gener. 255. V. priiiceps 

 Hassall, in Annals, vol. x. j). 388. 



Hab. Cheshunt: A.H.H. 



This species I described in the Annals of Natural History, 

 vol. X. p. 388., under the name of F. princeps; but not meeting 

 with it a second time, and fearing that it was not really dis- 

 tinct, I referred it to V. capillaris. I am now, however, 

 induced again to regard it as a distinct species, from the cir- 

 cumstance of its being described as such by Kiitzing under 

 the name of Isogonium capillare, a subgeneric ajipellation, be- 

 stowed upon it on account of the sporangia not producing any 

 considerable inflation of the fruit-bearing cells, — a cii'cum- 

 stance which scarcely called for such a distinction. The 

 figure given by Kiitzing accords closely wdth one made by 

 myself of the species long ago, and which I regret I have not 

 here introduced. The non or slight inflation of the cells will 

 distinguish it from all other described species. 



2. Vesiculifera capillaris Ilass. 



Plate L. Figs. 1, 2. 



Char. Filaments of considerable diameter. Cells varying in 

 length from nearly ticice to almost four times their dia- 

 meter. Sporangia large, circular, contained in distinct 

 inflations of the cells of an evidently ovate form. 



