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MR. H. MARSHALL WARD OH THE STRUCTURE 
Fig. 9. Portion of epidermis stripped off and examined from inside, showing branched 
mycelium of the Entyloma running between the underlying mesophyll cells 
(these are omitted for simplicity). Nuclei and plastidia are seen in the out¬ 
lined epidermis cells. Pesting-spores in various stages of development are 
being formed by the mycelium ; most of these are intercalary, one is at the 
end of a short branchlet. Haustorium-like protuberances are frequently 
developed and some branches anastomose. (Zeiss, J.) 
PLATE 11. 
Fig. 1 0. Similar preparation, the mycelium much branched. (Zeiss, J.) 
Fig. 11. Transverse section of a leaf of R. Ficaria, through a well-developed and 
active disease spot. The intercellular spaces are blocked up with mycelium and 
resting-spores ; in the lacunae below the orifices of the stomata the mycelium 
puts forth dense pencils of conidiopbores. In the figure the stoma on the 
upper surface is cut longitudinally, that on the lower surface transversely 
and nearer one end. Conidiopbores are also seen forcing their way between 
the epidermis cells of the upper side. The mycelium is all intercellular ; 
wherever it appears otherwise, close examination shows that it is applied to 
the exterior of the thin walls. (Zeiss, D.) 
Fig 12. Portion of extremely thin section through a disease spot, macerated and 
teased out. The two contiguous cells of the epidermis between which the 
hyphse forced their way to the exterior have become separated. Two 
resting-spores among the hyphse below. (Zeiss, J.) 
Fig. 13. Similarly teased preparation. The hyphse are older and show the septa 
more clearly. (Zeiss, J.) 
Fig. 14. Portion of very thin section as before, hardened and examined in glycerine. 
It shows very clearly the passage out of the conidiophore in the middle 
lamella of two contiguous epidermis cells. The vertical branch to the right 
appears to have passed out similarly, but was cut; it is attached below to a 
branch bearing a resting-spore. (Zeiss, J.) 
Fig. 15. Lacuna between palissade cells from similar preparation ; it is filled with 
resting-spores. (Zeiss, J.) 
PLATE 12. 
Figs. 16-18. Mycelium with resting-spores teased out and isolated from macerated 
specimens. (Zeiss, D.) 
Figs. 19 and 20. Ilesting-spores in various stages approaching maturity. (Zeiss, J.) 
