54-8 NEW YORK STATE MUSEUM 



3372 10 | 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 1 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. i860 



Platyceras conicumw Platyceras ( Orthonychia) 

 conicum 



Platyceras (Orthonychia) conicum Hall 



3374 !&■}■&*■ 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. 1, fig. 20-22. 



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

 pi. 1, fig. 20-22. 



Hamilton shales Bellona N. Y. 



C. A. White and C. Van Deloo, coll. i860 



Platyceras crassum Hall 



3375 ijI f-- 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° 7 type Platyceras (Orthonychia) dentalium Hall. 



Descriptions of new species of fossils from the Upper Hel- 

 derberg, Hamilton and Chemung groups. 1861. p. 1. 



Hall. Illustrations of Devonian fossi's. 1876. Gaster- 

 opoda, pi. 1, fig. 3. 



