Henfrey, on ChlorosphcBra, 
29 
name, and Ms description is superficial, but agrees in the 
main points with our plant. 
We have adopted the generic name suggested by the dis- 
coverer of the plant, Daniel Oliver, Esq., whose notes and 
sketches have been placed at our disposal, and with whom 
we have had the pleasure of observing the multiplication of 
the plant. Since the description is committed to our hands, 
we cannot better express our thanks for the assistance Mr. 
Oliver has given us, than by dedicating the species to him. 
Chlorosphaera [Algarum unicellularum, genus novum.) — 
Cellula simplex, libera, globosa, hyalina, materia viride gra- 
nulosa, nonnunquam trabeculas mucosas radiatas obscure 
exhibente, repleta. Cellula materna partes duas septo 
seque divisa, et substantia interna tota, utroque loco cellu- 
1am novam constituente, rimis discretis expulsa. 
C. Oliveri, Henfrey. — Cells about -^f o^hs of an inch in 
diameter, rich grass- green. Found in boggy ditches. 
Prestwick Carr, Northumberland. D. Oliver, jun., March, 
1857, and 1858. 
Obs. — Hofmeister considers this plant (if we are correct 
in identifying it with his) as forming a link between the 
Desmidiese and the Palmelieee. We do not see any near re- 
lation to the Desmidiese, nor, indeed, to any of the ordinary 
forms of Palmellese. There may, perhaps, be some relation 
to Braun's genus Schizochlamys, where the parent-cell splits 
into four pieces to set free its progeny, but the two plants 
stand widely apart in all important respects. The large size of 
the cells and their solitary habit remove these plants from 
the Palmellese, and lead rather to their comparison with the 
filamentous genera. Taking all points into consideration, it 
is perhaps in the vicinity of the (Edogoniece they will find 
their true place, especially if our suspicion as to the antheri- 
dial nature of the flask-shaped bodies be correct. It is true 
we have not observed zoospores, but it is by no means 
impossible that they may occur, formed from the whole con- 
tents of the half-cells and the splitting of the parent-cell 
wall to allow the new cells to escape, as the ordinary multi- 
plication is not very distantly related to the annular 
dehiscence of the wall of (Edogoniece at each process of cell- 
division. 
