18 Nr. 2. L. KoLDERUP ROSENVINGE: 
of a nucleus like that in the cell to the right of it. The 
two daughter nuclei are still without nuclear membranes, 
Another division stage is shown in fig. 15 K, but here the 
chromosomes are not distinct. The nuclear divisions ob- 
served were evidently all mitotic. No indication of a synapsis 
ss 
i 
ED CRD 
Fig. 16. A—F, from the same material as fig. 14. The chromatophores 
not distinct in figs. A—C. One end-cell in B contains two nuclei. Ripe 
monospores are present in C. D, the last cell contains a nearly ripe 
spore, a younger spore is developing in the cell beneath it. E, a spore 
has been exhausted to the right and a new monosporangium is develop- 
ing beneath it. The narrow, clavate intensely stained cells are perhaps 
end-cells of primary nemathecial filaments. F, ripe monospore not yet 
set free showing nucleus and two chromatophores. G, living, ripe spore 
set free in May. A—D, 670:1. E—F, 1080:1. G, 670:1. 
stage or a heterotypic division was ever met with. The 
formation of the monosporangia is thus not preceded by 
a reduction of the number of chromosomes, and this is in 
accordance with the fact that no fertilisation process has 
