EXPLANATION OF PLATE II. 



The Cucumber Mildew. {Plasmopara Ciibensis) (B. & C.) 



Fig. II. A conidial thread arising from a vegetative tliread; sp., two summer 

 spores {j:onidia~). x 540.* 



Fig. 12. A portion of a vegetative thread giving rise to two conidial threads 

 througli the same leaf-pore, x 540. 



Fig. 13. A young conidial thread with the spores not yet fully developed and 

 still in place, x 540. 



Fig. 14. A portion of a vegetative thread among the cells of .1 leaf, four of 

 which are shown, and penetrating them by its Juxusloria, It. x 540. 



The Alildeiv of the Star Cucuinher. (^Plasmopara australis .Spag.) 

 Fig. 15. A conidial thread and spores; a x 350 ; sp. spores x 540. 



Fig. 16. A portion of a vegetative thread, with hnustoria, h. x 540. 



77/ if Bro7iii! Rot of Stone Fruits. (^Monilia frttctigena Pers.) 

 Fig. 17. Spore chains, x 540. 



Fig. 18. End of a growing chain, showing beginnings of new spores and origin 

 of branching, x 540. 



Fig. 19. Threads terminating in spore chains, developed in five days from spores 

 sown on nutrient gelatine, x 200. 



Fig. 20. Tlireads, a, and resting cells {Gemiiiic), b, from the flesh of "mum- 

 mied" plums, in winter, x 540. 



The " Damping-off" Fungus. {Pythin/it de Baryamim Hesse.) 



Fig. 21. Two zo'osporangia, showing beginnings in formation of zoospores. 

 X 540. 



Fig. 22. A resting cell (^Geinmci). x 540. 



Fig. 23. Sexual organs; «, female cell {oogonium'), with a single male {anthe- 

 ridium") ; b, with two males ; r, resting spore {oospore), formed and 

 fertilized as shown by emptying of male cell, x 540. 



* See note to Plate I. 



