316 DR. D. D. CUNNINGHAM ON MYCOIDEA PARASITICA. 
DESCRIPTION OF THE PLATES. 
PLATE XLII. 
Fig. 1. Leaf of Camellia japonica affected by Mycoidea parasitica. 
2. Aerial filaments bearing the asexual fructification : x 92. 
Fig. 3. Group of young aerial filaments emerging from beneath the epidermis: x 180. 
4 
5 
. Upper extremity of an aerial filament, with stipitate spores arising from it: x 480. 
. A spore from which the zoospores have escaped, showing the rounded opening of exit and four 
zoospores yet remaining in the cell-cavity : x 960. 
Fig. 6. A free zoospore in its original condition : x 840. 
Fig. 7. Aportionofone of theaerial filaments, showing projectionson theinner surfaceof thecell-wall: x 960. 
` Fig. 8. A vertical section through a portion of a Camellia-leaf affected by two patches of Mycoidea 
parasitica: x 180, 3 
Fig. 9. Filaments from the subepidermal disk in their original condition: x 180. 
Fig. 10. Similar filaments from a plant with sexual fructification: x 180. 
Fig. 11. A young oogonium: x 180. Fig. 12. An oogonium with attached pollinodium : x 980. 
Fig. 13. Mature oogonium with escaping zoospores: x 960. 
Fig. 14. Portion of an oogonium showing development of ostiolum : x 980. 1 
Fig. 15. Portion from the surface of a leaf, showing the ruptured epidermis and protruding ostiolum of ` — 
the oogonium: x 1960. ; 
Fig. 16. (a) A zoospore in the circular condition: x 1960. (b) A zoospore after rupture of the cell-wall. 
(c) Oval particles contained in the interior of the zoospores. 
Fig. 17. Zoospores which have become circular and are beginning to germinate: x 1960, 
Pirate XLIII. 
Fig. 1. Group of mature oospores with filaments ramifying around the oogonia: x 180. 
Fig. 2. Mature oogonium with its ostiolum and oospore: x 960. 
Fig. 3. Young primary disk, resulting from the germination of a zoospore: x 700. 
Fig. 4. Vertical section showing the relation of the primary disk to the epidermis: x 180. 
Fig. 5. Portionof epidermis, with aprimary disk andthemassof subepidermal filaments arisingfromit: x 180. 
Fig. 6. Primary disk as seen from the surface : x 37. 
Fig. 7, Vertical section, showing germinating cells of the primary disk, and penetration of the epidermis 
by the buds arising from them : x 960. 
Fig. 8. Lichenous patch on the surface of a Nephelium-leaf : of natural size. 
Fig. 9. Portion of a patch with spermogonia and apothecia, viewed laterally : x 23. 
Fig. 10. Detached portion of a patch, showing the film of E Siem? the spermogonia, apothecia, 
and circular groups of gonidia: x 23. j 
Fig. 11. Section through a portion of a gonidial patch, showing the filamnets of the cortical layer, the 
. remains of the algal disk, the green gonidial cells, and the intergonidial hyphæ : x 960. 
Fig. 12. Portion of a primary disk, seen from below, with fungal filaments attached to it: x 960. 
Fig. 13. Spermatia: x 960. 
Fig. 14. Portion of dense cellular tissue from the point where the fungal filaments penetrate the disk: x 960. 
Fig. 15. Apothecium in vertical section: x 44. 
Fig. 16. Portion of the skeleton of a primary disk detached from a group of gonidia, with one or two goni- 
dial buds still connected with the cells: x 960. 
Fig. 17. Detached mass of hyph: and gonidia from one of the groups: x 960. 
Fig. 18. Free gonidia; two of them showing division of their contents : x 960. 
Fig. 19. Hyphz of the cortical layer: x 960. 3 
Fig. 20. Medullary fibres: x 960, Fig. 21. Asci and paraphyses : x 960. 
