McLEANSBORO GROUP 



91 



coal beds would greatly enlarge the under- 

 standing of the stratigraphy of the upper 

 part of the McLeansboro group in Illinois. 



Shelbyville Coal Bed 



The name Shelbyville has been designated 

 for the coal bed mined in the vicinity of 

 Shelbyville, Illinois, which is represented by 

 a sample from the Kingston Mine located 

 in the NE. l/ A SW. \/ A NE. i/ A sec. 33, T. 

 12 N., R. 4 E., Shelby County. This con- 

 tains the following genera and species : 



1. Punctati-sporites vagus sp. nov. 



2. Laevigato-sporites ovalis sp. nov. 



3. L. punctatus sp. nov. 



4. L. minutus (Ibrahim) S. W. and B., 1944 



5. L. vulgaris (Ibrahim) Ibrahim, 1933 



6. Endosporites formosus sp. nov. 



7. E. vesicatus sp. nov. 



8. E. plicatus sp. nov. 



9. E. sp. 



10. Calamospora liquida sp. nov. 



11. C. mutabilis (Loose) S. W. and B., 1944 



12. Raistrickia aculeata sp. nov. 



13. Florinites sp. 



Only six genera and 13 species have been 

 observed in the coal bed but all occur abun- 

 dantly. Endosporites accounts for 39 to 

 41 percent of the spore population. E. 

 formosus sp. nov., E. vesicatus sp. nov., E. 

 plicatus sp. nov., and E. sp. makes up 16, 

 13, 5 to 6, and 5 to 6 percent of the spore 

 population respectively. Laevigato-sporites 

 contains four species which represent 30 

 percent of the spore population. L. minu- 

 tus (Ibrahim) S. W. and B., 1944, L. 

 punctatus sp. nov., L. ovalis sp. nov., and 

 L. vulgaris (Ibrahim) Ibrahim, 1933, rep- 

 resent 11, 8, 6, and 5 percent respectively 

 of the spore population. Punctati-sporites 

 vagus sp. nov. represents 16 percent of the 

 spore population. The remaining genera 

 and species are of minor importance. The 

 small number of genera together with the 

 presence of Punctati-sporites vagus sp. nov. 

 and the abundance of the genus Endosporites 

 characterize this bed. 



Trowbridge Coal Bed 



The name Trowbridge designates the coal 

 bed exposed northwest of Trowbridge in 

 the NW. 1/4 sec. 14, T. 10 N., R. 6 E., 

 Shelby County, Illinois. The following 

 genera and species have been observed from 

 this bed : 



1. Punctati-sporites sp. 



2. Granulati-sporites levis sp. nov. 



3. Reticulati-sporites muricatus sp. nov. 



4. Laevigato-sporites robustus sp. nov. 



5. L. minutus (Ibrahim) S. W. and B., 1944 



6. Endosporites formosus sp. nov. 



7. Triquitrites spinosus Kosanke, 1943 



8. Calamospora liquida sp. nov. 



9. Jllinites sp. 

 10. Wilsonia sp. 



Only ten species are known to be present 

 in this coal bed although spores are abun- 

 dant. Endosporites formosus sp. nov. is 

 dominant, and represents about 80 per- 

 cent of the total spore population. Laevi- 

 gato-sporites robustus sp. nov. accounts for 

 13 percent of the spore population. The 

 remaining spores identified in the coal bed 

 are of minor numerical importance. 



E. formosus sp. nov., the dominant spore, 

 helps to identify the bed and L. robustus sp. 

 nov., which is abundantly present, appears 

 to be absent in the Shelbyville coal bed. 

 This and other differences in the spores of 

 the two beds make it seem probable that 

 the Shelbyville and Trowbridge are dif- 

 ferent beds. 



Woodbury Coal Bed (?) 



The type Woodbury cyclothem of New- 

 ton and Weller (1937) is exposed along 

 Webster Creek in the SE. \/ A sec. 32, T. 9 

 N., R. 8 E., Jasper County. The spores 

 of the Woodbury coal bed exposed at the 

 type locality are unknown. An exposure 

 of a four and one-half inch coal bed in the 

 SW. 1/4 sec. 31, T. 8 N., R. 9 E., thought to 

 be at the same stratigraphic position, pro- 

 vided the following genera and species: 



1. Punctati-sporites setulosus sp. nov. 



2. P. minutus sp. nov. 



3. P. firmus (Loose) S. W. and B., 1944 



4. Granulati-sporites commissuralis sp. nov. 



5. G. grandis sp. nov. 



6. G. gibbosus (Ibrahim) S. W. and B., 1944 



7. Laevigato-sporites ovalis sp. nov. 



8. L. minutus (Ibrahim) S. W. and B., 1944 



9. L. desmoinensis (Wilson and Coe) S. W. 

 and B., 1944 



10. Endosporites formosus sp. nov. 



11. E. vesicatus sp. nov. 



12. Triquitrites sp. 



13. Calamospora liquida sp. nov. 



14. C. hartungiana Schopf, 1944 



15. Raistrickia aculeata sp. nov. 



16. Illinites unicus sp. nov. 



17. "Spherites" sp. 



In addition to the species listed above it 

 is believed that at least one new species of 



