PAGE 



Macoupin coal bed 87 



Shoal Creek coal bed 88 



New Haven coal bed 88 



McCleary's Bluff coal bed ' 89 



Friendsville coal bed 89 



LaSalle coal bed 90 



Upper McLeansboro coal beds 90 



Shelbyville coal bed 91 



Trowbridge coal bed 91 



Woodbury ( ?) coal bed 91 



Watson coal bed 92 



McLeansboro coal and limestone beds in southern and southwestern Illinois 92 



Conclusion on the McLeansboro coal beds 92 



Discussion 93 



Summary 93 



Acknowledgments 93 



Plates and explanations 94 



References 126 



ILLUSTRATIONS 



FIGURE PAGE 



1. Outline of the procedure used in isolating the small spores for microscopic investigation. . 9 



2. Various types of spore coat ornamentation 11 



3. A radially symmetrical spore 14 



4. A bilateral spore 14 



5. Illinois counties from which coal samples were collected 56 



6. Correlation of coal beds Nos. 6, 5-A, and 5 with the aid of spores isolated from rotary- 



drill samples 77 



7. Correlation of lower McLeansboro coal beds, by plant spores, with suggested limestone 



correlations in Franklin County 82 



1. Genus Illinites and Punctati-sporites 94 



2. Genus Punctati-sporites 96 



3. Genus Granulati-sporites 98 



4. Genus Alati-sporites and Reticulati-sporites ... 100 



5. Genus Reticulati-sporites and Laevigato-sporites 102 



6. Genus Denso-sporites 104 



7. Genus Denso-sporites, Cirratriradites, and Endosporites 106 



8. Genus Triquitrites 108 



9. Genus Calamospora and Reinschospora 110 



10. Genus Reinschospora, Lycospora, and Raistrickia 112 



11. Genus Raistrickia 114 



12. Genus Raistrickia and Florinites 116 



13. Genus Schopfites and Schulzospora 118 



14. Genus Wilsonia 120 



15. Thin sections of Reynoldsburg coal 122 



16. Genus Cadiospora, Laevigato-sporites, Punctati-sporites, Lycospora 124 



17. Spore distribution chart (In pocket) 



18. Cross-section of McLeansboro coals and limestones in south-southwestern Illinois 



(In pocket) 



