Dcscj'iption of Plates. 3 1 9 



below, contains all the orange endochrome, and, having grown to a considerable 

 length, has taken three circumnutatory turns. X 475. C. B. P, 



l^'g- '3- — Another uredospore of the same, which, after twenty-six hours, 

 has become branched as well as having made several circumnutatory move- 

 ments. X 475. C. B. P. 



Fig. 14. — Abnormal germination of one of the same uredospores (after 

 ninety hours), in which a spore of reserve has been produced at the upper end 

 of the germ-tube. X 475. C. B. P. 



Fig. 15. — The germ-tubes of two uredospores of /V/c««?a! ^ra/;//;«j enter- 

 ing the stomata of a wheat plant. X 475. C. B. P. 



Fig. 16. — Two hyaline paraphyses of the uredospores of Mclampsora cpitca. 

 X 200. C. B. P. 



Fig. 17. --Two capitate hyaline paraphyses of the uredospores oi Piiccinia 

 anthoxanthi. x 300. C. B. P. 



Pigs. 18-21. — Development of a teleutospore of /■«(:(:/«/(? j^/awZ/z/j-. X 200. 

 De Bary. 



Fig. 22. — Teleutospore of Gymnosporan^ium clavar{,rforme germinating. 

 It has protruded two promycelia, one from each segment near the septum. 

 The endochrome is passing from the spore into the promycelia, leaving the 

 apex of the spores empty. X 475. C. B. P. 



Fig. 23. — The same further advanced. X 475. C. B. P. 



Fig. 24. — Four promycelial spores of the same, three of which liave 

 germinated, and one has formed a spore of reserve. x 475. C. B. P. 



Plate I\^ 



Fig. I. — Promycelial spores oi Piiccinia plialaridis piercing by their germ- 

 tubes the epidermal cells of Arum nuiculatum. X 475. C. B. P. 



Fig. 2. — Teleutospore of 6''r^/«_)'r^j _/«/!'« germinating, x 200. C. B. P. 



Fig. 3. — Teleutospore of Piuxiiiia coroimta germinating from both cells ;■ 

 both germ-canals are placed laterally. X 250. C. B. P. 



Fig. 4. — Teleutospore of Piiccinia arunditiacea germinating. x 250. 

 C. B. P. 



Fig. 5. — Teleutospore of PhragniidiiiDi ruhi, three cells of which have 

 germinated. X 300. C. B. P. 



Fig. 6. — Teleutospore of Triphraginium ul/narice germinating, x 475. 

 C. B. P. 



Fig. 7. — Teleutospore of Endophylluni euphorbice germinating ; two of the 

 promycelial spores have already emitted germ-tubes while still attached to the 

 promycelium. X 475. C. B. P. 



Fig. 8. — Three teleutospores of Melampsora betulina, two of which have 

 germinated and are emptied of their endochrome. x 475. C. B. P. 



Fig- 9- — Three teleutospores of Colcosporiuin senccionis, the upper compart- 

 ments of two of which have germinated and produced single promycelial 

 spores. X 300. C. B. P. 



Fig. 10. — Germination of Chrysomyxa rJiododcndri. After De Bary. 



Fig. II. — Gyiiinosporangiuin sabimc, thin-walled teleutospore germinating 

 (12 hours) ; t\yo germ-tubes have been emitted from each segment of the spore. 

 X 200. C. B. P. 



