144 
lying filament. If this interpretation is right, the fertilized carpogonium is first di- 
vided by a vertical wall and thereafter one of the daughter-cells is divided by a 
wall perpendicular to the first. The cell-complex shown to the left in fig. Q I take 
to be a more developed, perhaps a fully ripe cystocarp. The three larger, upwards 
directed cells are probably the carpospores; they are somewhat diverging, lying in 
one plane, the same as that of the branching of the plant. A stage so much devel- 
oped was only once observed. 
In spite of the likeness of our plant to the genus Chantransia in habit and 
in the monosporangia, it seems correct not to refer it to this genus but to regard 
it as the representative of a new genus, characterized in particular by the androphore 
cell being very different from the ordinary cells, and further by the development 
and structure of the cystocarps. Among the sexual species of Chantransia, Ch. hal- 
landica seems to be the one where the cystocarp offers most similarity with that 
of Kylinia, but unfortunately its development is not known. The fact that the 
androphore-cell is often situated on the carpogonium is analogous to the above de- 
seribed case, that an antheridia-bearing cell is often superposed on the carpogonium 
in Chantransia efflorescens. 
The genus is called after the Swedish phycologist, Dr. H. Kyrın, who has con- 
tributed so much to our knowledge of the northern marine Algæ. 
Locality. Kn: TP, Tenneberg Banke, 16 meters, on Sporochnus pedunculatus, September. 
Tribe Nemaliee. 
Nemalion Targioni Tozzetti. 
1. Nemalion multifidum (Web. et Mohr) J. Ag. 
J. Agardh, Linnæa Bd.15 p.453, Spec. II, p. 419, III p.508; Harvey, Phye. Brit. pl.36; Bornet et Thuret, 
Rech. féc. Florid., Ann. sc. nat. Veser.t.7, 1867 p. 141, pl. 11 fig. 1—5; Janczewski (1877) p.113, Plate 3 
fig.3; Wille, Ueber die Befrucht. bei Nemal. multif., Ber. deut. bot. Ges. 1894 p. 57; Grace D. Chester, 
Notes concerning the development of Nemalion multifidum, Botan. Gazette Vol. 21, 1896 p. 340 PI. XXV 
and XXVI; J. J. Wolfe, Cytolog. Stud. on Nemalion, Annals of Botany, Vol. 18, Oct. 1904; Oltmanns 
(1904) p. 539, 540, 542. 
Rivularia multifida Weber et Mohr, Naturhist. Reise 1804 p.193 Taf. III fig. 1. 
Chordaria multifida Lyngb. Hydr. p_ 51; Flora Dan. Tab. 1669. 
As to the structure of the frond reference may be made to the descriptive 
works and the paper of GRACE D. CHESTER. The ramification is said to be dichot- 
omous and it may possibly be so, but it may also be lateral, as shown in fig. 68 A, 
representing a young plant. The structure of the cells has been studied by WOLFE, 
from whose statements it appears that the presumed pyrenoid is not a true pyre- 
noid but a vacuolar cavity without organized contents. While the chromatophore 
is in general stellate, I found it in a basal dise globular without branches given 
off towards the periphery of the cell. 
As stated by Miss CHESTER the germinating spores develop at first into short 
branched, creeping filaments consisting of short rounded cells. Later on filaments 
