~5&|. * NEW YORK STATE MUSEUM 



Cyrtoceras filosum (Emmons) Hall 



3616 J^p^ PLASTOTYPE Cyrtoceras filosum Emmons. 



Geology of New York ; report on the 2d district. 1842. 

 p. 392, fig. 4. 



Cyrtolites filosum Hall. Paleontology of New 

 York. 1847. v. i, pi. 41, fig. 33. 



Trenton limestone Watertown, Jefferson co. N. Y. 



Geological survey collection 



Cyrtoceras (Gomphoceras ?) formosum Hall 



3617 lii^s. TYPE Cyrtoceras (Gomphoceras?) formosum 



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

 p 362, pi. 95, fig. 8, 9. 



Hamilton beds Dresden, Yates co. N. Y. 



Cyrtoceras jason see Cyrtoceras (Rhyticeras) 

 jason 



Cyrtoceras (Rhyticeras) jason Hall 



3618 12 * TYPE Cyrtoceras jason Hall. Descriptions of new 



species of fossils from the Upper Helderberg, Hamilton 

 and Chemung groups. 1861. p. 43. 



Gyroceras (Cyrtocera;s?) spinosum 

 Conrad. Illustrations of Devonian fossils. 1876. 

 Cephalopoda, pi. 52, fig. i. 



Cyrtoceras jason Hall. Paleontology of .New 

 York. 1879. v. 5, pt 2, pi. 50, fig. i. 



Schoharie grit Schoharie N. Y. 



J. Gebhard purchase 



3619 iAjjm. TYPE Hall. Illustrations of Devonian fossils. 1876. 



Cephalopoda, pi. 52, fig. 2. 



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

 pi. 50, fig. 2. 



Schoharie grit Schoharie N. Y. 



J. Gebhard purchase 



3620 i*J TYPE Hall. Paleontology of New York. 1888. v. 5, 



pt 2, supplement (=v. 7), pi. 124, fig. 7. 



Schoharie grit Clarksville N. Y. 



Cyrtoceras macrostoma Hall 



3621 A^pi PLASTOTYPE Cyrtoceras marginalis Conrad. 



Proceedings of the Academy of natural sciences of Phila- 

 delphia. 1843. 1:334. 



