EXPLANATION OF PLATE. 



1. Spermatia ofAecidium ranunculi repentis, after 48 hours in sugar and water ; x 865. 



2. Same as taken from the spermogonium ; x 865. 



3. Two capitate hyaline paraphyses of the uredo-spores ofPuccinia anthoxanthi ; x 1 70. 



4. A basipetal series of aecidiospores of Chrysomyxa rhododendri, showing alternate 



abortive cells. After De Bary ; x 510. 



5. Spermatia ofAecidium ranunculi repentis, after 12 hours in sugar and -water; x 865. 



6. Spermatia of Aecidium bellidis ; x 865. 



7. Teleutospore ofTriphragmium ulmariae, germinating; x 410. 



8. Spermatia ofAecidium bellidis on 6th day in honey and water; x 865. 



9. Abnormal germination of one of the uredospores of Puccinia graminis ; x 410. 

 10- Teleutospore of Uromycesfabcs, germinating; x 170. 



1 1. Spermatia ofAecidium bellidis, after 12 hours in honey and water, germinating; x 865. 



12. Spermatia of Aecidium punctatum, budding; x 865. 



13. Spermatia ofAecidium bellidis, after 12 hours in honey and water, germinating; x 865. 



14. Promycelial spores of Puccinia phalaridis piercing by their germ tubes the cuticle of 



Arum macula turn; x410. 



15. Three teleutospores of Coleosporium senecionis, the upper cells of which have germinated 



and produced each one promycelial spore; x 260. 



16. Spermatia of Puccinia adoxa; x 865. 



1 7. Aecidispore of Puccinia poarum, after 12 hours germination, showing circumnutation 



of germ-tube; x4IO. 



18. See No. 5. 



19. Spermatia of Aecidium berberMis; x 865. 



20. Aecidiospore of Gymnosporangium clavariceforme, with 6 germ pores; endochrome 



migrated to end of germ-tube ; x 4 1 0. 



21. Aecidiospores of Puccinia poarum; germ-tubes entering the stomata of Poatrivialis; 



x410. 



22. Teleutospore of Puccinia coronata, germinating ; x 180. 



23. Germ-tubes of the uredospore of Puccinia graminis entering stomata of wheat; 410. 



