EXPLANATION OF PLATE XIII 



Hetcrotrichia gabriclla Mass., p. 198. 



Fig. i. A group of sporangia, one expanded, the others empty, x 15. 

 Fig. i a. Capillitium of the species, x 600. 



Calonc/na anreitin Morg., p. 208. 



Fig. 2. A cluster of sporangia, magnified about 15 times. 



Fig. 2 a. The tip of an elater of the same species, x 1000. 



Fig. 2 /;. A single spore, x 1000. 



Fig. 2 c. A bit of the sporangium wall, x 600. 



Stemonitis pallida Wing., p. 123. 

 Fig. 3. Sporangia, magnified about 5 times. 



Comatricha pulchella (Bab.) Rost , p. 129. 

 Fig. 4. Sporangia, magnified about 15 times. 



Steuwnitis carolinensis Alacbr., p. 122. 

 Fig- 5- Sporangia, magnified about 15 times. 



Clastodenna dcharyanu/n Blytt.. p. 138. 

 Fig. 6. Sporangium, magnified about 60 times. 



Tric/iia contort a Rost., p. 210. 



Fig. 7. Tip of an elater, x 1400. 



Fig. 7 it. Spore of the same species, x 1400. 



Tricliia botrytis Pers., p. 216. 



Fig. 8. Tip of the elater. x 1400. 



Fig. Sa. Spore of the same species, x 1400. 



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