584 NEW YORK STATE MUSEUM 



Cyrtoceras filosum (Emmons) Hall 

 3616 -L2-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. 1, pi. 41, fig. 3a. 



Trenton limestone Watertown, Jefferson co. N. Y. 



Geological survey collection 



Cyrtoceras (Gomphoceras ?) formosum Hall 

 3 6!y 12.X05. type Cyrtoceras (Gomphoceras?) formosum 

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



P 3 62 > P 1 - 95' % 8 > 9- 



Hamilton beds Dresden, Yates co. N. Y. 



Cyrtoceras jason see Cyrtoceras (Rhyticeras) 

 jason 



Cyrtoceras (Rhyticeras) jason Hall 

 26x8 i2io.e TYPE Cyrtoceras jason Hall. Descriptions of new 

 species of fossils from the Upper Helderberg, Hamilton 

 and Chemung groups. 1861. p. 43. 



G y r o c e r a s (Cyrtoceras?) J§) s p i n o s u m 

 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. V. 



J. Gebhard'purchase 



3 6 19 jL^ioe TypE Hall. Illustrations of Devonian fossils. J] 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 20 12106 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 

 3 6 2 ! i2_px pla5TOType Cyrtoceras marginal is Conrad. 

 Proceedings of the Academy of natural sciences of Phila- 

 delphia. 1843. 1:334- 



