EXPLANATION OF THE PLATES. 



PLATE I. 



Fig. 1. A. Agaricus grammoccphaliis. 



a. spores. 



h. spicules or sterigmata. 



c. sporophores or basidia. 



d. tissue of trauia. 

 B. A. crctaccus. 



Fig. 2. Pcziza cupularis. 



a. ascus. 



5. sporidium. 

 Fig. 3. Hymenogaster toner. 



Showing spore surrounded by a sac, wliicli sometimes contains a 

 second spore. 



Fig. 4. Puecinia graminis. 

 Fig. 5. Tilletia Caries. 



a. spore sprouting, and crowned with processes. 



h. processes anastomosing. 



c. one of ditto, bearing secondaiy spores (after Tuhisne), 



