THEIR USE IN CORRELATION 115 



PLATE 11 



Fig. 1. — Raistrickia protensa sp. nov. holotype, maceration 474-A Slide 8, No. 6 coal bed Franklin 

 County, Illinois, spore body dimensions are 58.8 X 60.9 microns. Specimen focused to 

 illustrate trilete mark, lips, and commissure. 



Fig. 2. — Same specimen as in fig. 1, but focused to show projection opposite left ray. 



Fig. 3. — Oil immersion photomicrograph of projection from fig. 2, the projection is 15.2 microns 

 in length from the margin of the spore coat to the apex. Note the partate nature and 

 knobs at the apex of the projections. 



Fig. 4. — R. pilosa sp. nov. holotype, maceration 544 Slide 2, No. 7 coal bed, Fulton County, Illinois, 

 body dimensions are 39.9 X 40.3 microns. 



Fig. 5. — R. irregularis sp. nov. holotype, maceration 603-B Slide 6, No. 2 coal bed, Fulton County, 

 Illinois, overall dimensions are 71.4 X 71.4 microns. 



Fig. 6. — R. crocea sp. nov. holotype, maceration 603-C Slide 1, No. 2 coal bed, Fulton County, 

 Illinois, spore body dimensions are 69.3 X 73.5 microns. 



Fig. 7. — R. crinita sp. nov. holotype, maceration 544 Slide 9, No. 7 coal bed, Fulton County, 

 Illinois, spore body dimensions are 61.9 X 58.3 microns. 



Fig. 8. — R. imbricata sp. nov. holotype, maceration 500-D Slide 3, No. 6 coal bed, Wabash 

 County, Illinois, overall dimensions are 56.7 X 67.2 microns. 



