YU

EXPLANATION OF THE PLATES.

PLATE I.

Fig. 1. A. Agaricus grammocephalus.

a. spores.

b. spicules or sterigmata.

c. sporophores or basidia.

d. tissue of trama.

B. A. cretaceus.

Fig. 2. Peziza cupularis.

a. aseus.

b. sporidium.

Fig. 3. Hymenogaster tener.

Showing spore surrounded by a sac, which sometimes contains asecond spore.

Fig. 4. Puccinia graminis.

Fig. 5. Tilletia Caries.

a. spore sprouting, and crowned with processes.

b. processes anastomosing.

c. one of ditto, bearing secondary spores (after Tulasne).