95 
are placed singly or in small groups of two or three at the end of shorter branches; 
they are round, 3 y long, 2,5 u broad. The carpogonia are situated on similar, 
rather short, usually 1- to 5-celled, branches as those bearing the antheridia, and 
they are often placed in the immediate vicinity of the antheridia (figs. 21 E, 22 B). 
I have not succeeded in follow- 
ing the development of the cy- 
stocarpia, especially the first 
stages. It seems that the tri- 
chogyne disappears very soon 
after fertilization. In fig. 21 E 
is shown a carpogonium imme- 
diately before fertilization, in fig. 
23 another with adhering sper- 
matia, and in fig. 22 A and C 
abortive carpogonia are shown, 
but I have never seen a tricho- 
gyne on a carpogonium after 
the commencement of the divi- 
sions; it might perhaps have 
been on the place marked with * 
in fig. 22 D; the two spores situ- 
ated on each side of this must 
then be carpospores and the 
whole cell-complex a cystocar- 
pium. À very similar case is 
shown in fig. 23 B, and the plant 
shown in fig. 21 C bears undoub- 
tedly also two or three cysto- 
carps. The cystocarps are thus 
corymbiform and produce only 
a very small number of carpo- 
spores. Usually only two carpo- 
spores are present at the same 
time, but it is probable that 
others may develop after the 
first have been exhausted. The 
carpospores are somewhat larger 
Fig. 22. 
Chantransia hallandica 4, typica. A. fragment of plant with abortive 
carpogonia and sporangia. B, branchlet with antheridia and carpo- 
gonium. C, plant with abortive carpogonia and probably unripe cy- 
stocarps. D, eyslocarp, at * perhaps the place of the trichogyne, 50:1. 
AN plants from AH, 
than the sporangia, viz. 14—18 » long, 7—9 » broad. 
At some places, mostly in the northern Kattegat, specimens were met with 
which agreed in all essentials with those described above but differed in having 
shorter cells, about twice (11/2—3 times) as long as broad. The cells being, as in 
the main form, often a little enlarged at the upper end, they may differ somewhat 
