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PLATE 1. 



lErysipheae. 



Spliaerotheca Casta^iiei. Lev. 

 Fig. 1. Natural size on the leaf. 

 " 2. A group slightly magnified. 

 " 3. A conidiophore bearing three coriidia, with one at the base 



germinating, the germ tube entering one of the stomata 



of the leaf. 

 " 4. A porithecium having one of the appendages bifid at tlio 



tip. 

 " 5. Perithecium with the single 8-spored ascus escaping. 

 " 6. Four sporidia. 



Note. 

 « Figures on Plates i, 2, 3, 4, 6, 9, 11 , ij. 14. 15, iS, 21. not drawn to any scale. 



