80 Vert Brecner Wirrrock, ON THE PITHOPHORACES. 
Figs. 9 and 10. P. kewensis nob. 
Fig. 9. A branch carrying a helicoid, h, from a sterile specimen. 
» 10. The top cell of the principal filament of a sterile specimen transformed 
to a helicoid, h. ; 
Figs. 11 and 12. P. Roettleri (Roth) nob. 
Fig. 11. A branch from a fertile specimen, carrying a helicoid, h, which grasps a 
vegetative cell belonging to another specimen of a Pithophora. 
» 12. The top of a branch of a fertile specimen with a lateral helicoid, h. 
PLATE Vi. 
The figures are magnified 20 times, with the exception of fig. 6 
which is magnified 50 times. 
: Pithophora oedogonia (Mont.) nob. . 
Fig. 1. The lowest part of a sterile specimen with a unicellular rhizoid, rh, and 
cauloid branches placed opposite to each other. 
» 2. The lowest part of a fertile specimen with a pluricellular rhizoid, rh. A 
parting-wall between the cauloid and rhizoid part has not been formed in the 
germination of the mother spore, sg. 
» 8. The lower part of a fertile specimen with a very powerfully developed, 
sporiferous rhizoid, rh, carrying branches of as much as two degrees. The 
upper one of the twin spores, s’, in the cauloid has germinated in the same 
manner as the spores in fig. 6; compare the explanation of this figure. 
» 4. The lower part of the cauloid of a fertile specimen with a peculiarly rich 
system of ‘ramification, even embracing a branch of the 4:th degree, 0%. 
Numerous subsporal branches, bs?, Us?, as well as also basal accessorial 
branches (= rhizine branches), ac, occur. The spore, s, in the principal fila- 
ment has germinated in the same manner as the spores in fig. 6. Twin 
spores, s’, s’, occur in several places. 
» 5. Part of the cauloid in a fertile specimen. Subsporal branches, bs, occur, 
even placed opposite to each other. The subsporal cells are unusually short. 
6. Uppermost part of the cauloid of a fertile specimen. The spores, the in- 
closed, s, as well as the terminal one, st, have germinated while still attached 
to the mother specimen; and not in the normal manner with spores, but in 
the manner of prolific cells. 
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