VESICULIFERA. 203 



Hah. Clieshunt : A. H. H. Turf Dyke, near Ardrossaii, 

 Ayrshire : Major Martin. 



The aboA^e 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 S23ecimen of 

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

 M. Chauvin, and marked with doubt as Conferva dissilicns 

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

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

 work being probably identical with Desmidium miicosnm. 



18. Vesiculifera cardiaca Hass. 

 Plate LI. Fig. 4. 



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

 chella. Cells^ue or six times as long as broad. Sporangia 

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

 pared to a heart in form. 

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



voL X. p. 391. 

 Hah. Pond near Notting Hill : A. H. H. In a pool 

 between Hook Green and Lamberhurst : 31r. Jcnner. 



This species would a^Dpear to be an uncommon one, for I 

 have only twice met with it. 



19. Vesiculifera crisp a Hass. 

 Plate LII. Fig. 8. 



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

 cosum. Cells Visually three times as long as broad. 

 Sporangia circular, lodged in cells of an ovate form. 

 Vesiculifera crispa Hassall, MSS. 



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

 hurst and Ticchurst, and between Ramslye Rocks and 

 Broadwater Forest : Air. Jcnner. Cannon Hill Quarry, 

 near Ardrossan, Ayrshire : Major Alartin. 



