3 
Martensia a. o. (comp. N. SvE- 
DELIUS, Bau, Entw. d. Flori- 
deengatt. Martensia, K. Sy. 
Vet. Ak. Handl. Bd. 43, no. 7, 
1908) could not be observed. 
The spores, which arise by 
tetrahedrical division, con- 
tain each one nucleus (fig. 
208 A). A cell-wall separating 
the spores is shown in fig. 
207D. A small number of 
sporangia containing more 
than 4 spores, up to 8, was 
met with on a plant from 
the North Sea (aF, fig. 207 E). 
They had the same shape 
and size as the normal spor- 
angia or were only a little ER 
longer. The SPORES produced Spermothamnion repens. er A (Hirsholm), sporangia in ey- 
seem to be somewhat smaller moid cluster. B, young sporangia with one nucleus. C—D (North Sea). 
than the normal ones. C, sporangia in company with a procarp. D, sporangium without the outer 
LENE sporangial wall. E, two sporangia and a young procarp; the one sporan- 
The antheridia form gium with 8 spores. A—C, 150:1. D-E, 260:1. 
irregularly ovate stipitate or 
sessile bodies which may 
appear on particular plants 
or branches but more fre- 
quently occur in company 
with the procarps. In the 
first case they are frequently 
seriate on the inner side of 
shorter branches. The an- 
theridia-producingbranchlets 
are divided by transversal 
walls in a number of seg- 
ments which remain short 
exceptthe undermost segment 
which usually develops into 
a stalk-cell. The other seg- 
ments divide by vertical and 
oblique walls in a number 
of smaller cells all containing EE AU: 
= Spermothamnion repens. Sporangia. A (Hirsholm). B, € (North Sea), in 
one nucleus only, the outer- company with antheridia and procarps. B, € 150:1. 
D.K. D. Vidensk. Selsk, Skr., 7. Række, naturvidensk, og mathem. Afd. VII. 3. 39 
