122 CHiETOPIIORE.E. 



3. Draparnaldia repetita Hass, 



Plate XIL Fig. 2. 



Char. Filaments hrancliedy consisting of repeated series of cells, 

 each series composed of Jive or six cells, which decrease in 

 size from the first or lower cell to the last or upper one, 

 series oblique. Tufts dense, alternate. 



Hassall, in Annals of Nat. Hist., August, 1842 ; also in 

 loc. cit. vol. xi. 428. 



Hah. Cheshunt : A. H. H. 



" I have only once met with the above species, and then 

 but in small quantity : it is therefore no less rare than it is 

 curious. Each series of cells is an epitome of the entire plant, 

 Avhich consists but of an aggregation of such series. A 

 sketch of it was forwarded to Dr. Greville, who did not hesi- 

 tate to agree with myself in the opinion of its distinctness." 



4. Draparnaldia condensata Hass. 



Plate XI. Fig. 1. 



Char. Filaments of considerable size, sparingly branched. 

 Jivaiiches fujmished loith short cilia. Cells abbreviated. 



Hassall, in Annals of Nat. Hist. vol. xi. p. 429. 



This is one of the finest and most distinct species of the 

 genus. The only locality at present known for it is a large 

 fish pond opposite Mr. Bosanquet's school for girls in the 

 parish of Wormly, Hertfordshire. It diflfers from the two 

 preceding species in several respects. It is more sparingly 

 branched, the ramuli are never tufted, and the cilia rarely 

 prolonged: the cells are very short, usually broader than 

 long, and entirely filled with cndochrome. The habit of the 

 plant is also different, dwelling in water less fresh, and its 

 colour in consequence is less vivid than in most other Dra- 

 parnaldicB. 



