PLATE 1 



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

 used, indicated. 



Triletes subpilosus forma major (Dijkstra) ex Chaloner p. 18 



Figure 



1. Characteristic lateral compression with lips partially torn. Total length 

 1610 u. Maceration 943 slide 5, coal in the Bethel (Mooretown) Forma- 

 tion, Hardin County, Kentucky. Red filter, same scale as figure 8, (x30). 



2a. Smaller spore with more delicate spines. Slightly oblique compression. 

 Maceration 943 slide 6, coal in the Bethel (Mooretown) Formation, 

 Hardin County, Kentucky. Red filter, same scale as figure 8, (x30). 



2b. Same spore, detail of spines. Same scale as figures 4, 7b, (X150). 



3. Spore with strap-like (preservational?) spines. Slightly oblique com- 

 pression. Maceration 943 slide 6, coal in the Bethel (Mooretown) 

 Formation, Hardin County, Kentucky. Red filter, same scale as figure 

 8, (X30). 



4. Closely spaced spines of small immature spore. Spines about 154 p in 

 length with cup-shaped terminations. Maceration 943 slide 9, coal in 

 the Bethel (Mooretown) Formation, Hardin County, Kentucky. Scale 

 indicated below figure, (X150). 



5. Broken spore. Spines up to 124 n in length. Maceration 943 slide 12, 

 coal in the Bethel (Mooretown) Formation, Hardin County, Kentucky. 

 Red filter, same scale as figures 4, 7b, (xl50). 



6. Partially broken spore. Lateral compression. Total length 1480 p. 

 Spines sharper, more delicate, and more closely spaced towards apex. 

 Maceration 810 slide 11, coal in the Hardinsburg Formation, Critten- 

 den County, Kentucky. Red filter, same scale as figure 8, (x30). 



7a. Lateral compression. Total length 1385 /*. Maceration 166 slide XXII 

 (5. 6. 7), coal in Hardinsburg Formation, Johnson County, Illinois. Red 

 filter, same scale as figure 8, (x30). 



7b. Same spore, detail of spines. Red filter, scale indicated above figure, 

 (xl 50). 



8. Lateral compression. Total length 1170/*. Maceration 687A slide 1, 

 coal in the Vienna Formation, Johnson County, Illinois. Red filter, 

 scale indicated below figure, (x30). 



9. Spines about 124 /x in length. Maceration 200 slide 2, in Degonia For- 

 mation, Pope County, Illinois. Red filter, same scale as figures 4, 7b, 



(X150). 



04 



