JOURNAL OF MICROSCOPICAL SCIENCE. 



EXPLANATION OF PLATES XXVIII & XXIX, 



Illustrating Mr. H, Marshall Ward's Memoir on " The 

 Morphology and Life-history of a Tropical Pyrenomy- 

 cetous Fungus/-' 



Fig. 1. — Two leaves of Jasminmm imbescens affected by the epiphytal 

 mycelium ; a was still young, and preserved its green colour ; b was 

 turning yellow at the affected spots. Natural size. 



Fig. 2. — ^A small specimen of the fungus as seen with a low power ; the 

 round bodies are " fruits " in various stages of development. 



Fig. 3. — One of the above " fruit-bodies " more highly magnified (Zeiss 

 D). It is ripe, and has become opened by radial slits above, disclosing the 

 asci within. 



Fig. 4. — A similar " fruit-body " seen iu vertical section. Zeiss D. 



Fig. 5. — Germinating spore, showing early development of haustormm 

 from the young mycelium. Zeiss J. 



Fig. 6. — Small portion of older mycelium, showing hmistoria from the 

 short lateral branches. Zeiss J. 



Fig. 7. — Small portion of old mycelium, showing breaking up of the 

 lateral branches, each portion being capable of vegetative reproduction 

 Zeiss E. 



Fig. 8. — Sections through upper parts of leaf on which the mycelium is 

 well developed, and showing the liaustona penetrating into the cells. The 

 upper figures show cross sections of the hyphfe ; in the lower one the 

 razor has partially cut a radial branch longitudinally. Zeiss D and J. 



Fig. 9. — Portion of mycelium on which the " fruit-bodies " are com- 

 mencing to appear. Zeiss D. 



Fig. 10. — Part of the above more highly magnified. Zeiss J, 



Fig. 11. — Early stage of a young "fruit-body." Two septa have 

 appeared in one cell of the hypha, and lateral outgrowths are spreading to 

 form the disc. Zeiss E. 



Fig. 12. — More advanced condition of similar " fruit- body ;" the young 

 disc is formed. Zeiss E. 



Fig. 13. — An advanced state of the disc seen from above, and under 

 which the ascogenous tissue is beginning to form. Zeiss E. 



Fig. 14. — Vertical section of a young disc some distance from the 

 median line ; the space beneath is becoming filled with delicate hyphse. 

 Zeiss E. 



Fig. 15. — Similar section (slightly oblique) nearer the median line of an 

 older disc. The dark shading represents the cellular walls without details ; 

 the cavity is filled with delicate hyphae radiating from the walls. Zeiss E. 



