late Miss Hutchins of Bantry, but notwithstanding the figures 
given by Dillwyn, and in English Botany, and its very distinct 
characters, it has been much misunderstood. The specimens 
published by Mrs. Wyatt, under the name Conferva tortuosa, 
belong, in the copies of her valuable work which I have examined 
and, I suspect, in all the others, to our R. riparium. It is a 
more slender plant than C. fortuosa, of a paler colour, and, 
above all, distinguished by the root-like fibres which issue at 
intervals, from the articulations; and the presence of which 
has induced Kiitzing to place it in a separate genus. 
I am not certain whether all the synonyms quoted above 
belong to this, or to several closely allied species. According 
to Prof. Kiitzing there are three or four distinct plants con- 
founded under the Conferva riparia of authors, a point to 
determine which I have not sufficient data at hand. As regards 
the specimen now figured, it is at least certain that ours is the 
plant of Dillwyn, our figure having been prepared from one of 
the original specimens collected by Miss Hutchins. 
Fig. 1. RuizocLoNruM RIPARIUM; stratum,—of the natural size. 2. Filaments | 
from the same; magnified, 3. A portion :—more highly magnified. 
