140 DIMORPHISM IN FUNGI. 



growth."' Prof. Lankester concludes by saying, " Some of the 

 recently published books dealing with the cultivation of patho- 

 genic Bacteria contain also a general summary of what is known 

 as to the natural history of the group, and an attempt to classify 

 the non-pathogenic together with the pathogenic species. The 

 importance of the doctrine of the pleomorphism of Bacteria in 

 relation to pathological inquiries cannot be over-estimated." 



Bibliography. — Quart. Journ. Micro. Science, 1885 — 86 

 Grevillea, various years ; " Fungi " (International Scientific Series) 

 " Diseases of Field and Garden Crops " (Worthington Smith) 

 "Rust, Smut, Mildew, and Blight" (Cooke); Gardener's 

 Chronicle., etc. 



EXPLANATION OF PLATES XV., XVI, XVII. 



Fig. 1. — fl, Aspergillus glaucus ; b, conidia ; c, germinating conidium ; 

 d, Eurotium ; e, ascus of Eurotium. 



2. — Erysiphe gnvmUds, conidia. 



3. — Ditto, conceptacle. 



4. — Portions of Agarkus, with parasitic Hypomyces. 



5. — Conidia. 



G, 7. — Conceptacles of Hypomyces, slightly and highly magnified. 



8.— Asci. 



9. — Spores . 



10. — Stylospores. 



11. — Section of Tubercularia vulgaris. 



12. — Conidia. 



13. — Section of Nedria ciiinabarinis . 



14. — Asci. 



15. — Portion of twig, with Nedria and Tubercularia, in situ. 



16. — Wheat -leaf, with pustules of Uredo rubigo-vera. 



17. — Section of a pustule, showing the Uredo spores. 



18. — Germinating Uredo spore. 



19. — Section of pustule of Puccinia rubigo-vera. 



20. — Germinating telento spore. 



2L — Section of half a pustule of Uredo linearis. 



22. — Spores of Uredo linearis germinating on a wheat-leaf. 



23. — Section of half a pustule of Puccinia graminis. 



24. — Section of Barberry leaf, showing cups of ^cidium berberidis 

 on lower surface, and spermogones on upper surface. 



