92 
ALGOLOGICAL NOTES. 
do not, however, regard this as a proof of sexual action, for both 
kinds of plants grow together, and collecting might produce some 
admixture. It would appear improbable that fecundation of the 
spore takes place after the formation of the cell-wall. Hence it is 
more likely to occur in the earlier stage (oosphere) as in Fig. 14a, 
where the surface of the thallus is very close to the chlorophyll. 
To demonstrate the sexual action of the pollinoids will be no easy 
task. I hope, however, some attempt to germinate both spores 
and pollinoids in similar conditions will be made. If the minute 
bodies fail to do so, while the spores act as usual, it will be an 
additional argument for the sexual character of what I venture to 
call pollinoids. 
The male plants appeared to be slightly more yellow in tint 
than the female. The tessellated appearance of Prasiola is 
chiefly caused by small areas in which the division of the chloro- 
phyll has reached a stage differing from that of others adjacent. 
The process is not regular from base to apex. In a section of the 
male plant, e.g., a portion divided into eight tiers may be inter- 
posed between others with only four. 
Prof. Schmitz’s view that Porphyra and Prasiola should be 
placed near together, notwithstanding the contrast in colour, may 
possibly derive some confirmation from the present note. 
EXPLANATION OF PLATE 185. 
Chorda Filum Stackh. — Figs. 1-4. 
Fig. 1. — A spirally twisted plant ■— 8. Up to a, unilocular sporangia are 
alone present ; a-b, a few plurilocular sporangia are amongst the 
unilocular ; b-c, many plurilocular with a few unilocular ; c-d, 
only plurilocular are present. 
„ 2. — Small portion of surface of a spiral projection with plurilocular 
sporangia in various stages. The smallest bodies are the ends of 
as yet unchanged assimilation cells, x 200. 
„ 3. — Transverse section of thallus (at Fig. 1, below c). X 10. 
}} 4. — Portion of thin trans, section, a, a unilocular sporangium ; b y 
early stage of plurilocular sporangium ; cc, hairs ; d, fully mature 
plurilocular sporangium ; e, almost empty ditto. The remaining 
bodies are assimilation cells as yet unchanged. X 400. 
Giffordia Padince } sp. n. — Figs. 5-7. 
Fig. 5. — A medium-sized plant x 50. a, two antheridia at base ; a', an 
antheridium on erect filament ; bb, plurilocular sporangia. 
„ 6. — Antheridium. X 200. 
„ 7. — Plurilocular sporangium. X 200. 
Cladophora lanosa Kiitz. — Figs. 8-10. 
Fig. 8. — A branched filament with fertile cells. X 50. 
it 9. — Three fertile cells, a, the gametes are still in the cell ; 5, they are 
passing out ; c, they are in a mass of mucilage outside. X 200. 
„ 10. — Conjugation of zoogametes, a, a pair in the act of waltzing ; b, 
the union has commenced ; c, the hourglass stage ; d, zygosperm. 
X 800. 
