22. A. H. WORTHEN: F. B. MEEK and 



Remarks on some types of Carboniferous Crinoidea, with 

 descriptions of new genera and species of the same, and 

 of one Echinoid. In Proc. Acad. Nat. Sci. Phila., Vol. 

 XII, 2d ser., pp. 335-359, 1868. 



23. Geological Survey of Illinois, A. H. WORTHEN, Director, 



Vol. Ill, Geology and Palaeontology-, pp. i-vii and 1-574, 

 plates I-XX A.-H., and one map. Imp. 8vo. Chicago, 1868. 



CONTEXTS. 

 PART I. 



PAGES. 



Letter to the Hon. Richard J. Oglesby vii 



CHAPTER I. 



Coal Measures and Lower Carboniferous Limestones, A. H. 

 WORTHEN 3-19 



CHAPTER II. 

 Aeology of Alexander County, A. H. WORTHEN 20-32 



CHAPTER III. 

 Geology of Union County, A. H. WORTHEN 33-57 



CHAPTER IV. 

 Geology of Jackson County, A. H. WORTHEN 58-83 



CHAPTER V. 

 Geology of Perry County, A. H. WORTHEN 84-103 



CHAPTER VI. 

 Geology of Jersey County. A. H. WORTHEN 104-121 



CHAPTER VII. 

 Geology of Greene County, A. H. WORTHEN 122-133 



CHAPTER VIII. 



Geology of Scott County, A. H. WORTHEN 134-144 



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