205 
described development of the conceptacles has evidently been known to Scamrrz, 
as can be seen from the diagnosis of the genus Hildenbrandia in Scumirz and Haupr- 
FLEISCH Corallinaceæ in ENGLER u. Prantl, Nat. 
Pflanzenfam. I,2, p. 544. It is here said that 
the conceptacles are “anfangs sehr klein, unter 
allmählich fortschreitendem Verbrauch des 
nächst angrenzenden Gewebes allmählich an 
Grösse zunehmen”, and that they frequently 
fuse laterally together. The development is de- 
signed as “lysigen” though it is not lysigenous 
in the usual significance of the word. 
The sporangia are somewhat variable in 
shape and dimensions; they are now ovoid or 
obovate, e. gr. 21 long, 144 broad, now long, 
nearly cylindric, e. gr. 30 » long, 9,5 x» broad. 
The length varies between (16—)21 and 30 », 
the breadth between 9 and 12(14)». No rela- 
tion between the dimensions of the sporangia 
and the locality has been found. The dividing 
walls are always oblique. The first wall is much inclined to one side, the two 
following to the opposite side and often parallel to each other. But the first wall 
is often broken where it meets the following walls, in such a manner that the suc- 
cession of the walls is not always easily discernible. The upper part of the first 
wall is often bent downwards so that it goes in continuation of the upper secondary 
wall, and the sporangium thus presents the appearance of having been divided first 
into three by two parallel walls 
and afterwards by a wall dividing 
the middlemost cell into two (fig. 
125 J, B, E, F). The secondary walls 
nearly always intersect the primary 
one, but usually near its border; 
this is true particularly of the 
undermost wall, which may also 
meet it at the very border or 
even intersect the outer wall under 
the border (fig. 125 C). An ex- 
treme case is shown in fig. 125 K 
where the sporangium has the 
appearance of having been divided 
by nearly parallel walls; but on 
Fig. 124. 
Hildenbrandia prototypus. 
conceptacle with undivided and empty sporangia. 
Above a ripe sporangium. 260:1. 
Vertical section of 
Fig. 125. 
Hildenbrandia prototypus. A, left side of conceptacle in vertical 
section. B-K, ripe sporangia. A—F from Karrebæksfjord, G—K, 
from Guldborg. 560; 1, 
regarding only the insertions and 
not the curvatures of the walls, it 
