FROM THE FALKLAND ISLANDS. 231 
PLATE 6. 
Fig. 1. Endoderma maculans, Cotton, sp. nov. Surface view, showing filaments growing 
directly across the cells of Nitophyllum, and the commencement of the formation 
of pseudoparenchymatous tissue. (х 200.) 
Ditto. Pseudoparenchymatous tissue with ripe sporangia and also those which have 
already discharged their spores. (x 400.) 
З. Chordaria linearis, Cotton, comb. nov. Transverse section of a rather young branch 
with ripe sporangia. (x 400.) 
4. Ditto. Longitudinal section of а somewhat older branch, showing elongation of 
assimilating filaments and swollen terminal cells. (x 400.) 
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PLATE 7. 
Phyllophora cuneifolia, Hook. et Hary. One of Hooker's original Falkland Islands specimens 
now at Kew (nat. size). In other specimens the segments are more broadly cuneate. 
PLATE 8. 
Fig.l. Pteridium Bertrandi, Cotton, sp. nov. Portion of a large female plant bearing 
cystocarps. 
2. Do. Fragment of a tetrasporic plant showing disposition of tetraspores on either 
side of the midrib. 
3. Do. Fragment of a male plant with antheridial patches (not visible in the photo- 
graph) in the young segments. (All nat, size.) 
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PLATE 9. 
Fig.l. Lithothamnium Patena, Meydr. Vertical section of thallus showing concentric 
arrangement of cells of the hypothallus. 
Lithothamnium neglectum, Fosl. Cellular filaments of hypothallus. 
. Epilithon Vallentine, Lemoine, sp. nov. Cellular filaments seen from above. 
4. Do. Rather small specimens on the Red alga Glossopteris Lyallit, J. Ag. (Nat. 
s1Ze.) 
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PLATE 10. 
Fig. 1. Pseudolithophyllum discoideum, Lemoine. Young crusts on a limpet-shell. 
2, Do. Older crust showing the conceptacles, visible as minute points, over the whole 
surface of the alga. 
Figs. 3-6, Lithothamnion neglectum, Fosl, showing the different forms presented by the 
encrusting thallus. Figs. 3 and 4, Two of the commonest and most characteristic 
forms. Fig. 5. Crusts growing irregularly one above the other. Fig. 6. The 
right top corner shows characteristic young thalli, whilst the rest of the shell is 
covered by a single large adhering crust. (АП nat. size.) 
