THEIR USE IN CORRELATION 109 



PLATE 8 



Fig. 1. — Triquitrites pulvinatus sp. nov. holotype, maceration 628-A Slide 4, Murphysboro coal 

 bed, Saline County, Illinois, dimensions are 42.2 X 46.2 microns. 



Fig. 2. — T. protensus sp. nov. holotype, maceration 519-B Slide 1, Dekoven coal bed, William- 

 son County, Illinois, dimensions are 37.8 X 36.5 microns. 



Fig. 3. — T. discoideus sp. nov. holotype, maceration 542-B Slide 3, No. 8 coal bed, Peoria Coun- 

 ty, Illinois, dimensions are 71.4 X 67.2 microns. 



Fig. 4. — T. prisms sp. nov. holotype, maceration 587 Slide 13, Battery Rock coal bed, Hardin 

 County, Illinois, dimensions are 40.5 X 40.5 microns. 



Fig. 5. — T. spinosus Kosanke, 1943, maceration 600 Slide 1, LaSalle coal bed, Bureau County, 

 Illinois, dimensions are 50 X 51.5 microns. 



Fig. 6. — T. crassus sp. nov. holotype, maceration 574 Slide 21, Shoal Creek coal bed, Bond County, 

 Illinois, dimensions are 66.1 X 67.2 microns. 



Fig. 7. — T. inusitatus sp. nov. holotype, maceration 603-C Slide 4, No. 2 coal bed, Fulton County, 

 Illinois, dimensions exclusive of corner processes are 65.1 X 67.2 microns. 



Fig. 8. — T. angulatus sp. nov. holotype, maceration 520-A Slide 3, Bald Hill coal bed, William- 

 son County, Illinois, dimensions are 71.9 X 70.9 microns. 



