D()UBTFI:L 8rp:ciK8. 143 



SYSTEMATIC POSITION DOUBTFUL. 



Family NEOICOCERATID^.. 



Genus Neoicocekas Hyatt. 



Neoicoceras elkhornense Miller and Gurley. 



PlateXVI, figs. 9-11. 



1896. Goniatites elkhornciis/K, Miller and Gurle^-, Bull. lUiiioi.s State Mus. Nat. Hi.st. 



No. 11, p. 37, PI. IV, fig.s. 9-11. 

 1900. Neoicoceras elJiliomense, A. Hyatt, Cephalopoda, p. 550. 



This species was taken by Hyatt as the type of a new genus and 

 family of goniatites; the writer has examined the type specimen in the 

 paleontologic collection of the Walker Museum, University of Chicago, and 

 is of the opinion that it is not an ammonoid at all, but a nautiloid. 



Occurrence. — Middle Coal Measures, Elkhoru Creek, Kentucky. 



