upon it. The greater number of cells in the breadth of the 
frond, and the presence of occasional short ramuli, would seem 
to be the characters by which #. Ralfsii is to be known from 
the true 2. percursa. I have no opportunity at present (I write 
these lines on the shores of America) of examining other speci- 
mens, of consulting herbaria, or of communicating with more 
experienced botanists, and must consequently defer till a future 
time entermg more fully ito the distinctive characters of the 
species now proposed. 
Fig. 1. Tuft of EnrrromorpnHa Ratrstt:—the natural size. 2. Small frag- 
ments of different filaments. 3. A transverse section of a filament :—doth 
magnified. 
