548 NEW YORK STATE MUSEUM 



337 2 - ! 04 TYPE Hall. Illustrations of Devonian fossils. 1876. Gas- 



teropoda, pi. 2, fig. 22-25. 



Hall. Paleontology of New York, 1879. v. 5, pt 2, 

 fig. 22-25. 



Hamilton shales Canandaigua lake, N. Y. 



R. P. Whitfield and C. Van Deloo, coll. 1858 



3373 10 i 04 TYPE Hall. Illustrations of Devonian fossils. 1876. Gas- 



teropoda, pi. 2, fig. 26, 27. 



Hall. Paleontology of New York. 1879. v. 5, pt 2, 

 pi. 2, fig. 26, 27. 



Hamilton shales Bellona N. Y. 



C. A. White and C. Van Deloo, coll. 1860 



Platyceras conicum^<? Platyceras ( Orthonychia) 

 conicum 



Platyceras (Orthonychia) conicum Hall 



.3374 - Q f^- - TYPE Platyceras conicum Hall. Descriptions of 

 new species of fossils from the Upper Helderberg, Hamil- 

 ton and Chemung groups. 1861. p. 3. 



Hall. Illustrations of Devonian fossils. 1876. Gaster- 

 opoda, pi. i, fig. 20-22. 



Hall. Paleontology of New York. 1879. v. 5, pt 2, 

 pi. i, fig. 20-22. 



Hamilton shales Bellona N. Y. 



C. A. White and C. Van Deloo, coll. 1860 



Platyceras crassum Hall 



3375 i2~p- TYPE Platyceras crassum Hall. Descriptions of 

 new species of fossils from the Upper Helderberg, Hamil- 

 ton and Chemung groups. 1861. p. 8. 



Hall. Illustrations of Devonian fossils. 1876. Gaster- 

 opoda, pi. 7, fig. 6. 



Hall. Paleontology of New York. 1879. v. 5, pt 2, 

 pi. 7, fig. 6. 



Onondaga limestone Schoharie county, N. Y. 



Platyceras (Orthonychia) dentalium Hall 



.3376 J^f^i TYPE Platyceras (Orthonychia) dentalium Hall. 

 Descriptions of new species of fossils from the Upper Hel- 

 derberg, Hamilton and Chemung groups. 1861. p. i. 



Hall. Illustrations of Devonian fossils. 1876. Gaster- 

 opoda, pi. i, fig. 3. 



