Report of the State Geologist. 223 



Illustrations of Devonian Fossils, 1876; Cephalopoda, pi. 42, fig. 2. 

 Palaeontology of New York, vol. v, pt. 2, pi. 42, fig. 2. 

 Hamilton group. Pratts Falls, N. Y. 



Collected hy G. B. Simpson , 1871. 



Illustrations of Devonian Fossils, 1876; Cephalopoda, pi. 42, fig. 7. 

 Palaiontology of New York, vol. v, pt. 2, pi. 42, fig. 7. ^ 



Hamilton group. Otisco Lake, N. Y. \ 



Collected hy J. W. Hall and G. B. Simpson, 1872. 



Illustrations of Devonian Fossils, 1876; Cephalopoda, pi. 42, fig. 6. 

 Palaeontology of New York, vol. v, pt. 2, pi. 42, fig. 6. 

 Hamilton group. Pratt's Falls, N. Y. 



Collected hy G. B. Sim^pson, 1871. 



Illustrations of Devonian Fossils, 1876; Cephalopoda, pi. 42, figs. 5, 11. 

 Palaeontology of New York, vol. v, pt. 2, pi. 42, figs. 5, 11. 

 Hamilton group. Hamilton, N. Y. 



Pala3ontology of New York, vol. v, pt. 2, pi. 82, fig. 1. 

 Hamilton group. Pratt's Falls, N. Y. 



Collected hy G. B. Simpson, 1883. 



Palaeontology of New York, vol. v, pt. 2, pi. 82, fig. 2. 

 Hamilton group. Delphi, N. Y. 



Collected hy G. B. Simpson, 1 863. 



Palaeontology of New York, vol. v, pt. 2, pi. 82, figs. 3, 4. 

 Hamilton group. Pratt's Falls, N. Y. 



Collected hy H. H. Smith and C. Van Deloo, 1874. 



Palaeontology 'jOf New York, vol. v, pt. 2, pi. 82, fig. 5; pi. 113, figs. 

 13, 13a. 



Hamilton group. Pratt's Falls, N. Y. 



Collected hy H. H. Smith and C. Van Deloo, 1874. 



Palaeontology of New York, vol. v, pt, 2, pi. 82, fig. 6. 

 Hamilton group. Pratt's Falls, N. Y. 



Collected hy H. H. Sm,ith and C. Van Deloo, 1874. 



Palaeontology of New^ York, vol. v, pt. 2, pi. 82, figs 7, 8. 

 Hamilton group. Pratt's Falls, N. Y. 



Collected hy H. H. Smith and C. Van Deloo, 1874. 



