73 
The sporangia are cut off in the ordinary vegetative cells, in la}similar manner 
as in the genus Erythrotrichia, by a more or less oblique curved wall. The for- 
mation of sporangia takes place usually in the inner, intercalary cells, more rarely 
in the terminal cells. The orientation of the wall is not always the same; usually 
the sporangium is cut out at the proximal end of the cell, apparently very seldom 
at the distal end; but 
the wall is not seldom —@ooo— OSG 
longitudinal, particu- 
larly in short cells from 
which a branch is given 
off (fig. 12). The spores 
are in the fully deve- EL RS 
loped state nearly glo- Br > » 
bular, about 4 y in dia- 99009 © 
meter; they have more Q 
granular contents than SE 
the vegetative cells and Ae? Ya YEN I 
often show a distinct Fig. 11. 
parietal chromatophore Erythrocladia irregularis. A, young plant seen from above. B—D, more devel- 
oped plants with sporangia seen from above. E—I, plants in vertical section, 
(fig. 11 C, D, fig. 12). F—I, with sporangia. A—E 390:1. F—I 620:1. 
It is evident that 
the above described plant cannot be referred to the genus Erythropeltis on account 
of the structure of the frond. It differs further from E. discigera var. Flustre Batters 
by its much smaller spores, while the spores in 
Batters’ plant are about 9 # in diameter. 
Localities. Sk: Mollegrund off Hirshals, 11,5 to 15 meters, 
on Polysiphonia urceolata, August. 
2. Erythrocladia subintegra sp. nov. 
Thallus minutus suborbicularis. Fila sat regu- 
lariter radiantia, plerumque fere ad apices latera- 
liter connata, cellulis terminalibus tamen inter se 
plus minus discretis. Ramificatio fit in cellulis ter- 
minalibus, sæpe dichotoma. Cellule plerumque cy- 
Fig. 12. lindricæ, lat. 3—4 (—5) x, long. 8—10,5 w. Sporangia 
Erythrocladia irregularis. Plant with spor- jn parte proximali aut distali cellularum orta dia- 
angia seen from above. 730: 1. 
metro €. 4 (—S) y. 
In company with the foregoing species I found some individuals of a species 
evidently nearly related to it, but showing however such differences that I think 
it best to consider it as a distinct species. It is more regular, more or less approa- 
ching to the orbicular form, and consists of more regularly radiating, closer to- 
gether and a little thinner threads (3—4 4), which are most often united almost to 
D. K. D. Vidensk. Selsk. Skr., 7. Række, naturvidensk. og mathem. Afd. VII. 1. 10 
