216 Forty- SIXTH Report on the State Museum. 



Orthoceras pravum, Hall. 1879. 



( = O. tetricum, Hall, 1861, Descr. New Species Fossils, p. 45.) 



Illustrations of Devonian Fossils, 1876; Cephalopoda, pi. 86, fig. 2. 

 Palaeontology of New York, vol. v, pt. 2, p. 255, pi. 36, fig. 2. 

 Schoharie grit. Schoharie, N. Y. 



J. G ehhard purchase. 



Palaeontology of New York, vol. v, pt. 2, pi. 81, fig. 1. 

 Schoharie grit. Near Clark sville, N. Y. 



Collected by C. Van Deloo, 1862. 



Palaeontologv of New York, vol. v, pt. 2, pi. 81, figs. 2, 5; pi. 112, 

 fig. 17. 



Schoharie grit. Schoharie, N. Y. 



J. Gehhard ptirchase. 



Palaeontology of New York, vol. v, pt. 2, pi. 81, figs. 3, 4 ; pi. 112, 



fig. 16. 



Schoharie grit. Schoharie, N. Y. 



J. Gehhard purchase. 



Palaeontology of New York, vol. v, pt. 2, pi. 81, fig. 6. 

 Schoharie grit. Schoharie, N. Y. 



J. Gehhard purchase. 



Palaeontology of New York, vol. v, pt. 2, pi. 81, fig. 15. 

 Schoharie grit. Schoharie, N. Y. 



jr. Gehhard purchase. 



Orthoceras medium, Hall. 1879. 



Palaeontology of New York, vol. v, pt. 2, p. 254, pi. 79, figs. 11, 12. 

 Schoharie grit. Schoharie. 



J. Gehhard purchase. 



Orthoceras Thoas, Hall. 1861. 



Descr. New Species Fossils, p. 47. 



Illustrations of Devonian Fossils, 1876; Cephalopoda, pi. 41, fig. 1; 

 Palaeontology of New York, vol. v, pt. 2, 1879, pi. 41, fig. 1. 

 Coruiferous limestone. Schoharie, N. Y. 



J. Gehhard purcJiase, 



