41 



b. Carboniferous Rocks and Fossils of Nebraska. A par- 

 tial representation of the Carboniferous rocks and fossils 

 of southeastern Nebraska. 



The rocks of southeastern Nebraska have been referred 

 to both the Carboniferous and Permian systems ; but in 

 a recent paper Prof. Prosser correlates them with the 

 Webaunsee and Cottonwood formations of the Kansas 

 Upper Coal Measures. See Journ. Geol.^ V, Jan.- 

 Feb. No., p. I, and Feb. -Mar. No., p. 14S. 



c. Fossils from various New York formations. 



See especially Hamilton flagstone with worm-tracks 

 from Otsego County, and Fish scales and bones from 

 the base of Chemung group of Otsego County. 

 Rocks and Fossils from the Clinton and Hamilton 

 Formations of New York State. 



Exhibited by F. B. Loomis, Amherst, Mass. 



a. Clinton. 



1 . Specimens of the Hematite bed at Rochester, N. Y., 

 and other localities. 



2. Fossils of the Hematite Bed. 



Several young and new forms are included. Par- 

 ticular attention is called to microorganisms in the 

 chert. A microscope and drawings will illustrate 

 the series. 



b. Hamilton fossils from Canandaigua Lake, N. Y. 



1. A series of the Hingeless Brachiopods : Lingula., 

 Dignomia., Orbiculotdea^ Cra7iia^ Pholidops. 



2. A series of Lamellibranchs, Gasteropods and 

 Cephalopods. 



Types of Recently Discovered Fossils. 



Exhibited by Department of Geology of the American 

 Museum of Natural History. 

 a. Lower Silurian (Calciferous-Chazy) beds at or near 

 Fort Cassin, Vt. 



Described by R. P. Whitfield in Bull. A. M. N. H., 

 Vol. IX. (in press) . 



