_ 74 
the extremity, the terminal cells, however, being usually more or less free, and the 
same being also sometimes the case with the cell next to the end-cell. The rami- 
fication takes place exclusively or principally in the end-cells, and it has usually 
the character of a dichotomy, the cell bifurcating with two equally developed bran- 
ches; the one branch, however, may sometimes be stronger than the other. The 
cell-walls of the filaments are thin and often not easily distinguishable. In the inner 
part of the cell-disc a granular substance is often to be seen in the middle of the 
walls; perhaps interstices between the filaments. The 
chromatophore seems to be of the same shape as in 
AMA A227 
WRN ZA 2 5 a 3 : 
POLE the foregoing species, it is parietal, apparently mantle- 
ESM ET EE shaped, and seems to contain a pyrenoid; at all events 
FS. REISE 
a body of greater density is often visible in the middle 
of the cell. The cells are cylindrical or oblong or 
more irregular, usually 2—3 times as long as broad, 
if | in the inner part of the frond generally a little broader 
CON AAN than at the margin. 
i The sporangia are, as in E. irregularis, cut off in 
Erythrocladia subintegra. Frondgrow- the ordinary cells through a faintly curved wall, some- 
Så re UE pe ie times at the proximal, sometimes at the distal end of 
rangium is cut off. 650:1. the cell: they have a parietal, cupshaped chromato- 
phore and measure 4 y in diameter. 
This species shows more resemblance than the preceding to the genus Ery- 
thropeltis, from which it differs, however, by the margin of the frond consisting of 
separate filaments. If we supposed, that the distinction 
established between these two genera might prove not to 
be constant, there would be reason to compare Erythro- 
cladia subintegra with Erythropeltis discigera Schmitz. Such 
a comparison, however, is difficult to undertake, as the 
last-named species is imperfectly known, in particular on 
account of what is alluded to above (p.72) with regard 
to the limitation of the species. Using the magnification 
indicated by BERTHOLD I have calculated that the cells 
of his species are 5,5 to 7 » broad, thus considerably Fig. 14. 
broader than in E. subintegra, and in Erythropeltis disci- Æruthrocladia subintegra. Frond 
seen from above. A few sporangia 
gera var. Flustræ Batt., where the spores are much larger are visible. 630-1. 
than in our species, namely 9 » in diameter; the cells 
are also larger than in E. subintegra. It must therefore be supposed, that the spe- 
cies described here has not hitherto been observed, but I admit that it needs further 
investigation as well as the species of Erythropeltis and the relation between this 
genus and the genus Erythrocladia, and the relation between the genera Erythro- 
peltis and Erythrotrichia. 
The description given above refers only to the specimens mentioned as found 
