28 



PLATE 5 



Figure 



1 Megaphyton pr o tuber ans , ISM 1632, 

 scale 1:1, Chesterian (probably 

 lower part), Bay City, Pope 

 County, Illinois. 



Artisophyton insignis, PP 2936, 

 scale 1:1, Francis Creek Shale, 

 Langford Collection. The two 

 separated vascular traces 

 are visible. 



