388 Davis . — On Euglenopsis : a New 
vacuoles, number of cilia on the zoospores, and, most im- 
portant of all, the stalk bearing the vegetative cells which, in 
Chlorangium , is simple in structure, and very different from 
the highly specialized and complex chambered filament of 
this plant. 
The cells of Hauckia 1 and Mischococcns 2 are quite different 
in structure from the form we have described : the zoospores 
are produced several, four to eight, in a cell, and the stalks 
are comparatively simple in structure although more complex 
than that of Chlorangium . 
The stalk of Oocardium 3 is chambered, but the habit of the 
plant is very different, and the cells do not resemble those 
of our plant either in the character of the chromatophore, 
presence of a pigment-spot, or in general shape or arrangement. 
The nature of the filament with its compartments, resulting 
from the curious manner of growth, together with the structure 
and mode of formation of the zoospores, appear to the writer 
to be the most important characters of this plant, and these 
peculiarities make it desirable to describe it as — 
Euglenopsis , nov. genus 4 . 
Plants filamentous, branching above ; filaments formed of 
compartments, those below empty, the terminal containing 
green cells ; cells with a nucleus, a peripheric band-shaped 
grass-green chromatophore, and a red pigment-spot. Repro- 
duction by zoospores, four-ciliate, otherwise agreeing with the 
cells in structure ; sexual reproduction unknown. 
Euglenopsis sub sals a, nov. species. 
Filaments moniliform, when mature about £ mm. long, 
1 Borzi, Hauckia, nuova Palmellacea (Nuov. Giorn. bot. Italiano, vol. xii. 
1880). Wille, loc. cit. 
2 Nageli, Gattungen einzelliger Algen, p. 80, 1849. Wille, loc. cit. 
3 Nageli, loc. cit., p. 74. Wille, loc. cit. 
4 In the diagnosis of the genus and species we have used the term compartment 
to designate the cell-cavities of the filaments, and the word cell has been reserved 
for the masses of protoplasm contained in the compartments at the ends of the 
filaments. 
