KEY TO THE PLATES. 



Fig. 



1. Lycogala epidendrum, section through the cortex. 



2. Tubnlina stipitata, section of plant. 



3. Reticularia lycoperdon, columella and capillitiam. 



4. ,, ,, section through the cortex. 



5. Enteridiuni olivaceum, clustered spores. 



6. Eeticularia lycoperdon, spore. 



7. Lycogala epidendrum, tubes of capillitium. 



8. ,, cluster of plants, nat. size. 



9. ,, structure of sethaliuin. 



10. tube grown to inner wall of cortex. 



11. ,, section of an invidual plant. 



12. ,, portions of tubes of capillitium. 



13. Reticularia lycoperdon, agthalium nat. size. 



14. Cribraria pyriformis, magnified sporangium. 



15. Cribraria rufa, sporangium magnified. 



16. Heterodictyon mirabile, sporangium magnified. 



17. Dictydium cernuum, network from above. 



18. sporangium. 



J-9- >} >1 



20. Cribraria purpurea, network with thickenings. 



21. Cribraria aurantiaca, network with thickenings. 



22. Dictydium cernuum, network with thickenings. 



23. Cribraria tenella, network with margin of receptacle. 



24. Cribraria pyriformis, network with margin of receptacle. 



25. Clathroptychium rugulosum, section of portion of eethalium. 



26. Cribraria vulgaris, network with margin of receptacle. 



27. Cribraria intricata, network with thickenings. 



28. Clathroptychium rugulosum, permanent upper portion of wall of single 



sporangium. 



29. Clathroptychium rugulosum, another view of the same. 



30. diagrammatic plan of arrangement of 

 sporangia in asthalium. 



31 to 35. Stemonitis ferruginea, successive stages of growth. 

 36 to 39. sections of sporangium showing the colu- 



mella. 



40. Stemonitis fusca, section of sporangia. 



41. Stemonitis ferruginea, portion of columella. 



42. 43, 44- ,, ends of columella. 



45. Enerthenema elegans, section, with columella. 



46, 47. Comatricha typhiua, section, with columella. 

 48, 49. Enerthenema elegans, section, with columella. 



50. Stemonitis ferruginea. 



51. Comatricha Friesiana, various forms of sporangia. 



52. Enerthenema elegans, magnified sporangia. 



53. Echinostelium minutum, capillitium. 



54. stem and capillitium. 



55. Lamproderina physarioides, portion of capillitium. 



56. Comatricha Friesiana, natural size. 



57. Enerthenema elegans, capillitium and columella. 



58. Echinostelium minutum. 



59. Lamproderma physarioides, section of columella with origin of capil- 



litium. 



60. Brefeldia maxima, twin cells and threads. 



61. Lamproderma columbina, section of columella. 



