VESICULIFEKA. 199 



8. Vesiculifera paludosa Hass. 



Plate LII. Fig. L 



Char. Filaments of less considerable diameter than those of 

 V, lacustris. Cells usually three times as long as broad. 

 Sporangia oval, contained in inflated cells of the same 

 form. 



Vesiculifera paludina ? Hassall, in Annals of Nat. Hist., 

 vol. X. p. 390. 



Hab. Clieshunt : A. H. H. Framfield Common : Mr. 

 Jenner, 



This species comes nearest to V. ciliata ; but the inflated 

 cells are of a different form. I know not whether this be the 

 species, described by me in the " Annals " as Vesiculifera 

 paludina, or whether that species be different from V. capillaris, 

 not having had opportunities of making any comparative ex- 

 amination of them. 



9. Yesiculifera pulchella Hass. 



Plate L. Fig. 3. 



Char. Filaments of considerable diameter. Cells usually two 

 and a half or three times as long as broad. Sporangia 

 circular^ contained in much inflated cells, which are at first 

 oval, then circular, and lastly somewhat hexagonal. 



Hab. Cheshunt ; dotting Hill : A. H H. 



This is a very fine species, seeking usually rather pure 

 water ; it is of an intense and beautiful green colour. 



10. Vesiculifera Ralfsii Hass. 

 Plate L. Fio;. 8. 



Char. Filaments usually rather smaller than those of V. pul- 

 chella. Cells varying in length from twice to four times 

 . their diameter. Sporangia circular, lodged in cells of an 

 hexagonal form. 



o 4 



