PLATE 2. 



Figure 7. Part of the same. (X 180.) 



Figure 8. Part of another horizontal section showing Pila kentuckyana. 

 (X 120.) 



Figure 9. More highly magnified view of the same showing a tetrad of 

 spores. (X 180.) 



Figure 10. Another horizontal section of the same showing spores and 

 the supposed Algse. (X 180.) 



Figure 11. Another of the same showing a very characteristic spore and 

 a considerable number of the supposed Algse. (X 180.) 



Figure 12. Another preparation of the same, showing a spore-like body 

 and fragments of numerous supposititious Algse. (X 180.) 



