EXPLANATION OF PLATE XVII 



Cribraria argillacea (Pers.) Schrad., p. 161. 

 Fig. i . Sporangium, highly magnified. 



Cribraria inacrocarpa Schrad., p. 161. 

 Fig. 2. Sporangium, highly magnified. 



Cribraria aurantiaca Schrad., p. 164. 

 Fig. 3. Sporangium containing spores, x 30. 



Cribraria inicrocarpa Schrad., p. 167. 

 Fig. 4. Sporangium containing spores, >: 30. 



Cribraria tend! a Schrad.. p. 167. 

 Fig. 5. Sporangium containing spores, x 40. 



Cribraria minutissima Schw., p. 162. 



Fig. 6. A single sporangium calyculate, x 50. 



Fig. 6 a. A smaller sporangium without calyx, with spore-mass. 



Cribraria cuprca ATorg., p. 171. 

 Fig. 7. A single sporangium, x 50. 



Cribraria viola cca Rex, p. 168. 

 Fig. 8. A single sporangium, x 40. 



Cribraria pirifonnix Schrad.. p. 166. 

 Fig. 9. A single sporangium, >: 30. ^ 



PerichcTiia dcpressa (Libert) Rost., p. 183. 

 Fig. 10. A cluster of sporangia, one open, x 8. 



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