REPRODUCTIVE ORGANS OF CHARACEZ. 391 
eclour whilst young, it turns to a deep brick-red as it becomes 
mature. It consists of eight valves, or, as they have been 
termed, shield-cells, each of which is a flattened triangular 
cell, curved so as to present a convexity to the outer surface 
of the globule, and having its margins crenate or toothed, 
so as to dovetail, as it were, with the adjoining shield-cells. 
From the centre of each shield an oblong cell (jig. 858, c), the 
manubrium, is given off in a perpendicular direction. The 
Fic. 856. Fic. 857. 
STR LA 
i! iy ib it i sy aN 
3 
ith 
hth 
Fig. 856. A. Portion of the axis of Chara fra- 
gilis. s. Nucule or pistillidium. a. Globule or 
antheridium. 6b. Internode. c. Crown or co- 
ronaof nucule. B. Abortive leaves. B’, B’’, 8”, 
Sterile leaflets. B. sk. nucule, and a, globule, 
both in an early stage of development. w. : Aas 
Nodal cell of leaf. uw. Union cell between it — 
and basal node of globule. J. Cavity of in- 
ternode of leaf. 67. Cells of leaf covered with 
cortex. After Sachs. Fig. 857. A portion 
of a filament, jil, of jig. 858, in the cells of 
which the antherozoids are developed ; with 
a 2-ciliated antherozoid by its side. 
Fig. 858. A globule cut in half to show the 
oblong cells or manubria, c, and the septate 
filaments, fil. After Henfrey. 
eight cells from the eight shields converge in the centre of the 
globule. A ninth cell of a similar form, but larger than the 
others, also penetrates into the centre of the globule between 
the four lower shield-cells; this is the stalk which fixes the 
globule to the branch upon which it is placed. At the central 
end of each manubrium is a rounded cell, which supports in 
turn four other smaller cells, and from each of these latter four 
confervoid filaments are given off (fig. 858, fil), in each cell of 
which is produced a single spiral antherozoid (fig. 857), which 
