Report at the State Geologist. 227 



Orthoceras Deniusj, Hall. 1879. 



Palaeontology of New York, vol. v, pt. 2, p. 311, pi. 90, fig. 1. 

 Chemung group. Philipsburgh, N. Y. 



Palaeontology of New York, vol. v, pt. 2, pi. 90, fig. 5. 

 Chemung group. Ithaca, N. Y. 



Collected by J. W. Hall and G. B. Simpson 1870. 



HORMOCERAS, Stokes. 1838. 



Ilormoceras filosuniy Hall. 1847. 



Palaeontology of New York, vol. i, p. 55, pi. 15, fig. Ic. 

 Black Kiver limestone. Watertown, N. Y. 



Hormoceras tenuifihim, Hall. 1847. 



Palaeontology of New York, vol. i, p. 55, pi. 14, figs. 1, la, lb. 

 Black River limestone. Watertown, N. Y. 



Albany Institute do7ior, 1892. 



Hormoceras? gracile. Hall. 1847. 



Palaeontology of New York, vol. i, p. 58, pi. 17, fig. 3. 

 Black River limestone. Watertown, N. Y. 



Albany Institute donor ^ 1891. 



Hormoceras remotiseptuni. Hall. 1850. 



Tliird Report on New York State Cabinet of Natural History, 

 p. 173, pi. 4, fig. 3. 



Trenton limestone. Watertown, N. Y. 



Geological Survey collection. 



ENDOCERAS, Hall. 1847. 



Undoceras longissimum, Hall. 1847. 



Palaeontology of New York, vol. i, p. 59, pi. 18, fig. 1, la. 

 Black River limestone. Watertown, N. Y. 



Albany Institute donor, 1891. 



Dndoceras duplicatum. Hall. 1847. 



Palaeontology of New York, vol. i, p. 219, pi. 55, fig. 1. 

 Trenton limestone. Middle ville, N. Y. 



tf. Gebhard purchase. 



