8 Fresh-water Algce of Canada. 341 



raon somewhat definite gelatine. Afterwards, on its bursting, they 

 issue from it like a Conferva, but are at all times very gelatinous. 

 In the dried state it makes a beautiful specimen for the portfolio. 



IV. D. nana, Hass. 

 Char. — Filaments highly mucous, very slender, sparingly branched. 

 Branches acuminate, not usually ciliated. Cells rather broader 

 than long. 



Hassall's Hist. Brit. F. Algce, p. 124, Plate X, fig. 3. 

 Hob. — Stagnant pools on the road by the river to Point St. Charles, 

 Montreal. 

 This species is not unlike D. condensata. Its characteristic dis- 

 tinction is the fineness and mucosity of its filaments, and the 

 shortness of its cells. Our specimens were found in stagnant 

 pools upon dead wood. Its habitat may both account for its 

 want of ciliae, and entitle it to be considered as a distinct species. 



Genus II. Ch^tgphora, Schranlc.> 

 Char. — Filaments embedded in a gelatinous matrix, globose or 

 lobed, aggregated, branched, articulated, sometimes setaceous, 

 and issuing from a common base. Branches nearly colorless. 

 Hamuli colored. 

 Derivation from chaite, a bristle, and phoreo, to bear. 

 Hassall's Hist. Brit. F. Alg., p. 124. 

 Vaucher classes this genus among the Batrachospermeae. He 

 notes also in the gelatinous matrix of the older specimens a num- 

 ber of stony particles which he conjectures to be ruptured cells, 

 and destined to reproduce the species. It is questionable if these 

 stony grains belong to the plant at all. Most probably they are 

 foreign matter absorbed by the gelatine in the process of its 

 growth. The general character of this genus is very distinct. In 

 external appearance some of the species are exceedingly like Nos- 

 tochinem ; but the filaments contained in the matrix, differ widely 

 from that family iu being aggregated, frequently branched, and in 

 springing from a common base. 



Of this genus we have fouud specimens of the following species : 



I. Ch^ETOPHORA ENDIVI^lFOLIA, Ag. 



Char. — Mucous matrix somewhat compressed, sub-dichotomously 

 branched. Primary branches frequently 'parallel, apices of 

 ultimate ramuli ciliated. 



Vaucher's Hist, des Conf, p. 116, Plate XIII, fig. 1. Hassall's 

 Hist. Brit. F. Alg., p. 125, Plate IX, figs. 1 and,2. 



