terminal cells but segment cells, and are therefore connected 
with at least two neighbouring cells by primary pits. The 
ripe tetrasporangia project into the central cavity (comp. 
Kürzıng, Phyc. gen., tab. 55 IV). 
The germination of the tetraspores begins, according 
to Kyrın (1917, p. 5), by formation of vertical walls by 
which the spore is divided into four quadrant cells which 
are then further divided by horizontal walls. After 6 days 
the germlings had the appearance of multicellular globular 
bodies giving off at the base some 4 rhizoids, and showing 
at the top a group of smaller, meristematic cells, the 
initial cell-group of the upright frond. I have examined the 
germination of tetraspores and carpospores in cultures, but 
the cell-divisions were usually irregular, without doubt owing 
to the unfavourable conditions in the cultures, and only a 
small number of germlings resulted. The best developed of 
them showed after 17 days a thick, more or less orbicular 
attachment dise and an erect shoot issuing from it. Older 
germlings were found in Nature, the youngest growing on 
fructiferous specimens of Chylocladia kaliformis, both in 
tetrasporiferous and in cystocarp-bearing individuals. These 
germlings had usually a thick, hemispherical or nearly 
oo 
ES 
= 
2: 
Be. 
>08 
So, 
Fig. 579. 
Chylocladia kaliformis. Young 
plant growing ona cystocarp- globular attachment body, and springing from it an upright 
bearing specimen of the same 
meer Anant, Beil frond. When this was about half a mm high, it was cylin- 
drical without constrictions, and with an outer layer consisting 
of small, rather uniform cells. Not unfrequently two fronds were issuing from the same 
attachment disc (fig. 576). In the germ- 
ling represented in fig.579, which was 
about 1 mm high, the frond is inflated, 
hollow with at least one septum and 
with longitudinal cell-rows in the 
cavity. The identity with Chyl. kali- 
formis was thus indubitable. These 
germlings were met with in August 
and probably originated from spores 
of the fronds on which they were i 2 Hi83580: , 
x Chylocladia kaliformis. Young plants, growing on Rhodomela 
found growing. More developed young and Brongniartella, September. A, 3.5:1. B, 2:1. 
plants, met with in September and 
October, were only from a few mm to 2 cm high; they were provided with hairs, 
but only feebly developed or rudimentary. 
The species has only been met with in the Northern and Eastern Kattegat. 
Its absence in the North Sea and Skagerak is certainly dué to the want of protected 
