898 DR R. KIDSTON AND PROF. W. H. LANG ON OLD RED SANDSTONE PLANTS 
Fungus No. 4. 
Fig. 15. Group of resting-spores of Fungus No. 4 from a decayed stem of Asteroxylon. x 100. 
(No. 2528.) 
Fig. 16. Three of the resting-spores from fig. 15. x 250. (No. 2528.) 
Fungus No. 5. 
Fig. 17. Small, oval, thick- walled resting-spores of Fungus No. 5 from a decayed stem of Rhynia major. 
x 100. (No. 2529.) 
Fig. 18. Some of the resting-spores from fig. 17. x 250. (No. 2529.) 
Fungus No. 6. 
Fig. 19. Hyphse bearing oval and spherical vesicles from a partially decayed stem of Rhynia major. 
x 250. (No. 2393.) 
Fungus No. 7. ( Palxomyces Asteroxyli.) 
Fig. 20. Hyphse of various diameters and vesicles of Fungus No. 7 from the decayed inner cortex of 
a rhizome of Asteroxylon. x 100. (No. 2439.) 
Fig. 21. Stout hyphse of Fungus No. 7, one of which is branching, x 250. (No. 2525.) 
Fig. 22. Two longitudinally running hyphse of Fungus No. 7, showing a transverse, anastomosing 
branch. x 250. (No. 2525 ) 
Fig. 23. Fine hyphse of Fungus No. 7 dilating into oval vesicles, x 250. (No. 2530.) 
Fig. 24. Fine hypha of Fungus No. 7 dilating into a vesicle, x 250. (No. 2439.) 
Plate III. 
Fig. 25. Longitudinal section of outer portion of a rhizome of Asteroxylon showing the two layers of 
outer cortex practically free from the fungus, the hyphse and vesicles of which are present between the 
cells of the inner cortex, x 100. (No. 2525.) 
Fig. 26. Portion of tangential section of the inner cortex of another rhizome of Asteroxylon showing 
the intercellular position of the fungus. x 100. (No. 2468.) 
Fig. 27. More broken-down portion of inner cortex of a rhizome showing the hyphse and vesicles of 
Fungus No. 7. x 100. (No. 2530.) 
Fig. 28. Two cells of the outer cortex of the rhizome of Asteroxylon shown in fig. 25. The figure shows 
hyphse on the surface of the cortex with, to the left, a recurved, hook-like branch (a) ; on the right the 
fungus with a vesicle (6) appears to be within a superficial cell, x 250. (No. 2525.) 
Fungus No. 8. ( Palxomyces Hornex.) 
Fig. 29. Portion of a section of the rhizome of Hornea showing hyphse and resting-spores of Fungus 
No. 8 between the cells of the tissue. x 100 (No. 2531.) 
Fig. 30. Outer portion of a rhizome of Hornea showing strands of stout hyphse and a hyphal tangle, 
x 75. (No. 2531.) 
Fig. 31. Vertical section of another rhizome of Hornea showing a hypha entering from the hyphal mass 
outside and ramifying between the cells of the rhizome. x 75. (No. 2532.) 
Fig. 32. Hypha of Fungus No. 8 between cells of rhizome. x 250. (No. 2531.) 
Fig. 33. Portion of the hyphal knot shown in fig. 30. x 250. (No. 2531.) 
Fig. 34. Resting-spore and hyphse of Fungus No. 8 in rhizome of Hornea. x 250. (No. 2531.) 
Fig. 35. Group of mature resting-spores, presumably of Fungus No. 8, in relation to decayed rhizomes 
and stem-bases of Hornea. x 100. (No. 2443.) 
