44 Cincinnati Society of Natural History. 



Ulrich, E. O. 



1911 — Revision of the Paleozoic System Bull. Geol. Soc. Am. 

 vol. 22, pp. 281-680. 



Van Horn, Frank R. 



1909 — Landslide accompanied by buckling, and its relation to 

 local anticlinal folds. Bull. Geol. Soc. Am., vol. 20, 

 pp. 625-632. 



Winchell, N. H. and Ulrich, E. O. 



1897 — The Lower Silurian deposits of the upper Mississippi province: 

 a correlation of the strata with those in the Cincinnati, 

 Tennessee, New York and Canadian provinces, and the 

 stratigraphic and geographic distribution of the fossils. 

 Geol. Nat. Hist. Surv. Minn., vol. 3, pt. 2. 



( To be continued) 



