VESICULIFERA. 207 



uninflated. Cells usually Jive times as long as broad. 

 Sporangia circular, lodged in inflated cells of a somewhat 

 hexagonal form, but much larger than those of V. hexa- 

 gona. 



Hob. Penzance: Mr. Ralfs. 



This species approaches rather closely to V. hexagona, from 

 which, however, I think that it is distinct. 



29. VESICULIFEEA MULLERI Hass. 

 Plate LIIL Fig. 10. 



Char. Filaments more slender than those of V. fasciata. Cells 

 fully four times as long as broad. Sporangia spherical, 

 contained in inflated cells of a regularly globular form. 



Vesiculifera Mulleri Hassall, in Annals and Mag. of Nat. 

 Hist., vol. x. p. 393. 



Hob. Cheshunt : A. H. H. Rusthall Common and 

 Hawkhurst : Mr. Jenner. 



This species is by no means common ; I have never met 

 with it but once. 



30. VESICULIFERA Boscn Hass. 

 Plate LII. Figs. 3, 4, 5. 



Char. Filaments slender. Cells about six times as long as 

 broad. Sporangia oval, contained in greatly enlarged cells 

 of the same form. 



Prolifera Boscii M. Leon le Clerc, loc. cit. t. 25. f. 5. V. 

 elegans Hass., Annals, vol. x. Conf. tumidula, Eng. 

 Bot. 1670. 



Hob. Henfield: Mr. Borrer. Rusthall Common: Mr. 

 Jenner. 



There is not a more distinct or prettier species than this 

 in the genus. 



I do not know whether figs. 4, 5. pi. 52. are to be regarded 

 as varieties of this or distinct species. 



