PLATE 15 



All specimens photographed with transmitted light. Color of filter, when 

 used, indicated. 



Punctatisporites cf. P. obesus (Loose) Potoni£ and Kremp p. 64 



Figure 



1. Poorly preserved example. Suture open. Diameter 145 /x- Maceration 

 625Bf slide 4, Willis Coal, Gallatin County, Illinois. Safranin stained. 

 Same scale as figure 3, (x300). 



2. Smaller example with more triangular outline. Diameter 112 /x. Mac- 

 eration 625Bf slide 5, Willis Coal, Gallatin County, Illinois. Safranin 

 stained. Same scale as figure 3, (x300). 



Reticulatisporites cf. R. irregularis Kosanke p. 64 



3. Proximo-distal compression. Two rays of suture barely visible. Diam- 

 eter 158 ix. Maceration 144, "Sub-Babylon" Coal, Fulton County, Illi- 

 nois. Green filter, scale indicated below figure, (X300). 



Renisporites confossus n. sp p. 65 



4. Lateral compression showing thickening of spore coat around suture. 

 One lateral puncta group in focus. Length 169 /x. Maceration 625A 2 

 slide 10, Willis Coal, Gallatin County, Illinois. Same scale as figure 3, 

 (X300). 



5a. Proximo-distal compression. Holotype. Length 170 /x. Maceration 

 625Bf slide 2, Willis Coal, Gallatin County, Illinois. Safranin stained. 

 Same scale as figure 3, (x300). 



5b. Same spore. Detail of lateral puncta group. Scale indicated below fig- 

 ure, (X600). 



Sporangial masses of Densosporites p. 67 



6. Total length 4200 p. Maceration 604A slide 8, Tarter Coal, Fulton 

 County, Illinois. Scale indicated below figure, (xlO). 



7. Cuticle from sporangial mass of Densosporites. Maceration 604A slide 

 11, Tarter Coal, Fulton County, Illinois. Scale indicated below figure, 

 (X150). 



Seed membranes p. 67 



8. Inner membrane enclosed in a thin membrane with coarse reticulate- 

 appearing surface. Length 3435 p. Maceration 798 slide 7, lowest coal 

 in diamond drill core, Caseyville Group, Wabash County, Illinois. 

 Same scale as figure 9, (xl5). 



9. Large membrane with thick coat. Length about 5345 p. Maceration 

 760 slide 1, coal in Tar Springs Formation, Johnson County, Illinois. 

 Red filter, scale indicated below figure, (xl5). 



10. Seed membrane with apical cap. Length 2980 p. Maceration 760 slide 

 4, coal in Tar Springs Formation, Johnson County, Illinois. Same scale 

 as figure 9, (xl5). 



[132] 



