Fig. 
» 
Fig. 
» 
» 
Fig. 
On THE PITHOPHORACES. 75 
2. A piece of a branch of the 1:st degree with two inclosed cylindrical spores; 
in the uppermost cell a third spore is in the act of being formed. 
3. A piece of the principal filament with an inclosed, cylindrically cask-shaped 
spore. 
Figs 4 to 7. P. equalis nob. 
4. A piece of the cauloid, viz. a short bit of the principal filament with a very 
short accessorial branch, ac, and a long normal fertile branch of the 1:st de- 
gree, carrying a branch of the 2:d degree, b?. 
5. A complete and fertile specimen, quite devoid of branches, with a rudi- 
mentary rhizoid, rh. 
6. The lower part of a sterile specimen. At sy? the mother spore of the 
specimen has probably been situated; and if this be the case the specimen 
would be quite devoid of a rhizoid. 
7. The uppermost part of a big sterile specimen with the branches almost 
unilateral. 
P. kewensis. nob. 
. 8. A complete, though rather small, sterile specimen with a rudimentary rhizoid, 
rh. The top cell of the principal filament is unusually short and, against the 
rule, supports a branch. 
Bigs) 9 to 12) P. Zellerig@ Mart.) nob. 
9. A piece of a fertile cauloid. The subsporal cells have, instead of (as usual 
in this species) forming another spore below the one first formed, sent forth 
each a subsporal branch, 0s. Another branch of the first degree incloses a 
pair of twin spores, s’, s’. 
10. A piece of the principal filament of a fertile cauloid. The lower spore, 
s’, in the upper pair of twin spores has, against the rule, formed a perfectly 
individual cell-wall. The upper spore in the lower pair of twin spores has germi- 
nated, like a prolific cell, while still attached to the mother specimen. Compare 
pl. 6, fig. 6. 
11. The uppermost part of the principal filament of a fertile cauloid. All its 
cells have formed twin spores s’, s”. 
12. The lower part of a sterile specimen. The cell marked +h probably be- 
longs to the rhizoid, and the one marked ac is probably an accessorial basal 
(rhizine) branch. 
Figs. 13 to 17. P. polymorpha nob. 
. 13. The middle part of the cauloid of a richly ramified fertile specimen. 
14. The top of a branch of the 1:st degree. 
15. A piece of a cauloid. The principal filament carries two abnormal 
branches, in which the cells marked p, p’ are probably prolific cells. 
16. A piece of a cauloid with twin spores, s’, s’, in branches of the 1:st-degree 
as well as in the principal filament. 
17. The uppermost part of the cauloid in a somewhat deviating, fertile spe- 
cimen. Observe an inclination to ramify in the top cell of the principal fila- 
ment as well as in a terminal cell of a branch. 
