27 



26. A. H. WORTHEX: F. B. MEEK and 



Remarks on the Blastoidea, with descriptions of new 

 species. In Proc. Acad. Nat. Sci. Phila., Vol. XIII, 2d 

 ser., pp. 83-91, 1869. 



27. A. H. WORTHEN; F. B. MEEK and 



Note on the relations of Synocladia. King, 1849, to the 

 proposed genus Septopora, Prout, 1858. In Proc. Acad. 

 Nat. Sci. Phila., Vol. XIV, 2d ser., pp. 15-18, 1870. 



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



Descriptions of new species and genera of fossils from the 

 Paleozoic rocks of the Western States. In Proc. Acad. 

 Xat. Sci. Phila., Vol. XIV, 2d ser., pp. 22-56, 1870. 



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



Vol. IV. Geology and Palaeontology, pp. i-vii and 1-508, 

 plates G, H, and I-XXXI, Imp. 8vo., Chicago, 1870. 



CONTEXTS. 



PART I. 

 Letter to the Hon. John M. Palmer vii 



CHAPTER I. 

 Geology of Calhoun County, A. H. WORTHEX 24-42 



CHAPTER II. 

 Geology of Pike County, A. H. WORTHEX 43-61 



CHAPTER III. 

 Geology of Adams County, A. H. WORTHEX 43-61 



CHAPTER IV. 

 Geology of Brown County. A. H. WORTHEX 62-74 



CHAPTER V. 

 Geology of Schuyler County. A. H. WORTHEX 75-89 



CHAPTER VI. 

 Geology of Fulton County, A. H. WORTHEN 90-110 



