165 
outer small cells form an assimilatory tissue; the cells of the inner cortex are much 
larger, containing also several bandlike and ramified chromatophores, but the total 
mass of these bodies is small compared with the volume of the cell. WıLLE men- 
tions these cells as store-cells, “Speicherzellen” (1887 p. 87), as floridean starch is stored 
in great quantity in them. These cells are connected with each other by small pits. 
The cell-rows of the cortex depart from the longitudinal filaments of the central 
tissue, which consists not only of these filaments but also of irregular hyphæ origi- 
naling as outgrowths 
from the barrel-shaped 
cells of the inner cor- 
tex (fig. 79). The dif- 
ference between these 
two kinds of filaments 
in the medulla has al- 
ready been remarked 
by older authors as 
KüTzING and CASPARY; 
WILLE on the other 
hand (1885 and 1887) 
only refers to the se- 
condary hyphe but not 
to the primary longitu- 
dinal filaments’. The 
difference is conspi- 
cuous, the longitudinal 
filaments running very 
regularly and consi- 
sting of long cylin- 
SE 
Co my meee oe 
"REE AKER 
rer 
RR 
Fig. 79. 
5 Furcellaria fastigiata. A, transverse section of frond, at the limit between the me- 
drical cells connected dulla and the inner cortex. B, longitudinal section of the same. c, inner corlical 
cells; I, longitudinal filaments; h, hyphæ. After living material, April. (190:1). 
with large pits, while 
the hyphæ run irregularly, though chiefly in a transversal direction, and are com- 
posed of more heterogenous cells, those of the proximal part being more or less 
inflated, while the cells of the distal part are cylindrical. The cells of the hyphæ 
contain narrow, partly branched chromatophores. In the longitudinal filaments I 
did not observe any chromatophores, but Denys (I. c. p. 10) states that their cells 
contain colourless ones. This author states that the hyphæ are given off from the 
longitudinal filaments’; it is possible that they may also be produced by these, 
For illustration of the anatomical structure of this species WILLE gives only a copy of a figure 
by Kürzıng (Phycol. gener. tab. 72 fig. 6; Wırre Taf. VIII fig. 14), representing Furcellaria lumbrialis; 
but this is identical with Polyides rotundus, which differs from Furcellaria just in the structure of the 
medulla. OrLrmanns makes the same error (1904 p. 546 fig. 330). 
? Denys calls the longitudinal filaments “Längshyphen,” but incorrectly, as these filaments have not 
the active apical growth combined with slipping growth (“gleitendesWachsthum”) characteristic of the hyphe. 
