l66 NEW YORK STATE MUSEUM 



Upper Chazy limestone Chaz}% Clinton co. N. Y. 



R. Ruedemann, coll. 1903 



Nautilus jason see Plectoceras jason 



Nautilus kelloggi see Eurystomites 

 kelloggi 



Nautilus natator see Barrandeoceras 

 natator 



ONCOCERAS Hall 



Oncoceras pristinum Ruedemann 



6422 J-§-p-S- TYPE Oncoceras pristinum Ruedemann. 



New York state museum bulletin 90. 1906. p. 503, 

 pi. 34, fig. I. 



Upper Chazy limestone Chazy, Clinton co. N. Y. 



R. Ruedemann, coll. 1903 



6423 J-^f^-S- TYPE Ruedemann. New York state museum bul- 



letin 90. 1906. pi. 34. fig. 2. 



Upper Chazy limestone Chazy, N. Y. 



oocERAS Hyatt 

 Ooceras (?) lativentrum Ruedemann 



6424 -i-^-p-§- TYPE Ooceras (?) lativentrum. Ruede- 



mann. New York state museum bulletin 90. 1906. 

 p. 497; p. 498. fig- 52. 

 . Lower Chazy limestone Chazy, Clinton co. N. Y. 



G. van Ingen, coll. 1902 



ORTHOCERAS Brcynius 

 Orthoceras sp. 



6425 ^^p-S- HYPOTYPE Orthoceras sp. Clarke. Arch, do 



Mus. do Rio de Janeiro. 1899. v. 10. Author's 

 Eng. ed. 1900. pi. 2, fig. 28, 29. 



Siluric Rio Trombetas, Para, Brazil 



O. A. Derby & T. M. Clarke, donors 



Orthoceras clintoni see Spyroceras 

 clintoni 



Orthoceras cornu-oryx see Orygoceras 

 cornu-orvx 



