5^4 



NEW YORK STATE MUSEUM 



Cyrtoceras filosum (Emmons) Hall 



3616 plastotype Cyrtoceras filosum Emmons. 



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

 P- 39 2 > % 4- 



Cyrtolites filosum Hall. Paleontology of New 

 York. 1847. v. 1, pi. 41, fig. 3a. 



Trenton limestone Watertown, Jefferson co. N. Y. 



Geological survey collection 



Cyrtoceras (Gomphoceras ?) formosum Hall 



3617 * 9 \ Q5 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 -^y^" TYPE Cyrtoceras jason Hall. Descriptions of new 



species of fossils from the Upper Helderberg, Hamilton 

 and Chemung groups. 186 1. p. 43. 



Gyroceras (Cyrtoceras?) spino|sum 

 Conrad. Illustrations of Devonian fossils. 1876. 

 Cephalopoda, pi. 52, fig. 1. 



Cyrtoceras jason Hall. Paleontology of New 

 York. 1879. v. 5, pt 2, pi. 50, fig. 1. 



Schoharie grit Schoharie N. Y. 



J. Gebhard purchase 



3 6j2 i£i0 6 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 



3 6 2Q JULLoe 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 

 362 j isjQT. plastotype Cyrtoceras margin a lis Conrad. 



Proceedings of the Academy of natural sciences of Phila- 

 delphia. 1843. 1:334. 



