TYPE SPECIMENS OF PALEOZOIC FOSSILS 655 



4108 J^|££ hypotype Hall. Paleontology of New York. 1879. v. 5, 



pt 2, pi. in, fig. 6. 



Schoharie grit Clarksville, Albany co. N. Y. 



Trochoceras discoideum see Trochocer.is 

 (Sphyradoceras) discoideum 



Trochoceras (Sphyradoceras) discoideum Hall 



4109 1-2-fc-O. type Trochoceras discoideum Hall. Descrip^ 



tions of new species of fossils from the Upper Helderberg, 

 Hamilton and Chemung groups. 1861. p. 36. 



Trochoceras clio Hall. Illustrations of Devonian 

 fossils. 1876. Cephalopoda, pi. 59, fig. 6. 



Trochoceras discoideum Hall. Paleontology 

 of New York. 1879. v. 5, pt 2, pi. 59, fig. 8. 



Schoharie grit Schoharie N. Y. 



J. Gebhard purchase 



Trochoceras eugenium Hall 



4110 J^-J-fi- 4 - hypotype Trochoceras eugenium Hall. 14th 



annual report of the New York state cabinet of natural 

 history. 1861. p. 108. 



Trochoceras sp.? Hall. Illustrations of Devonian 

 fossils. 1876. Cephalopoda, pi. 48, fig. 3. 



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

 pi. 58, fig. 3. 



Schoharie grit Schoharie county, N. Y. 



J. Gebhard purchase 



41 1 1 J^-l^- 4 - type Hall. Illustrations of Devonian fossils. 1876. 



Cephalopoda, pi. 59, fig. 9. 



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



pl. 59» fi g- "• 



Schoharie grit Schoharie county, N. V. 



J. Gebhard purchase 



Trochoceras expansum Hall 



41 12 -1-2.5-5-5- type Trochoceras expansum Hall. Paleon- 



tology of New York. 1879. v. 5, pt 2, p. 402, pi. 1x1, 



fig- 5- 



Schoharie grit Schoharie county, N. Y. 



J. Gebhard pun I 



