VESICUL1FEKA. 203 



Hob. Cheshunt : A. H. H. Turf Dyke, near Ardrossan, 

 Ayrshire : Major Martin. 



The above is a very beautiful species under the microscope : 

 it is to be distinguished from all others by the shortness of its 

 cells. In the Herbarium of Dr. Greville I find a specimen of 

 this species, not indeed in a state of reproduction, put up by 

 M. Chauvin, and marked with doubt as Conferva dissiliens 

 Lyngb. It is certainly not the Conferva dissiliens, either of 

 Dillwyn's work, or of " English Botany," that of the latter 

 work being probably identical with Desmidium mucosum. 



18. VESICULIFERA CAKDIACA Hass. 

 Plate LI. Fig. 4. 



Char. Filaments of much less diameter than those of V. pul- 

 chella. Cells Jive or six times as long as broad. Sporangia 

 circular, placed in much inflated cells, which may be com- 

 pared to a heart inform. 



Vesiculifera cardiaca Hassall, in Annals of Nat. Hist., 

 vol. x. p. 391. 



Hob. Pond near Netting Hill : A. H. H. In a pool 

 between Hook Green and Lamberhurst : Mr. Jenner. 



This species would appear to be an uncommon one, for I 

 have only twice met with it. 



19. VESICULIFERA CRISPA Hass. 

 Plate LII. Fig. 8. 



Char. Filaments much more slender than those of V. ventri- 

 cosum. Cells usually three times as long as broad. 

 Sporangia circular, lodged in cells of an ovate form. 



Vesiculifera crispa Hassall, MSS. 



Hob. Cheshunt and vicinity : A. H. H. Between Wad- 

 hurst and Ticehurst, and between Ramslye Rocks and 

 Broadwater Forest : Mr. Jenner. Cannon Hill Quarry, 

 near Ardrossan, Ayrshire : Major Martin. 



