82 BuLIvETiN 12 2IO 



Gyroceras gracile (Hall) . . x 



Rockford (James Hall). 



*Gyroceras inelegans Meek x 



Falls of the Ohio. 



Gyroceras jason Hall x 



Rare. Ivexington, Ind. 



Gyroceras? rockfordensis M. and W x 



Rockfprd (Meek and Worthen). 



*Munsteroceras oweni (Hall) x 



Common. Scott county, lo, Rockford 

 (Hall), Crothersville, Ind. 



*Munsteroceras parallum (Hall) x 



Rockford (James Hall). 



Nautilus maximus Conrad x 



Falls of the Ohio (Nettleroth). 



^Nautilus (Cryptoceras) rockfordensis M. 



and W X 



Rockford (M. and W.). 



Nautilus (Discus) trisulcatus M. and W x 



Rockford (M. and W). 



Orthoceras sp 



Brownstown, Pixley knob, and New 

 Albany, Ind. 



Orthoceras caldwellense M. and G x 



Clark county (M. and G.). 



^Orthoceras heterocin(flum Winch x 



Rockford. 



Orthoceras icarus Beecher x 



Rare. Rockford (James Hall), Croth- 

 ersville. 



Orthoceras indianense Hall x 



Common. Rockford (James Hall), 

 Crothersville, Ind. 



Orthoceras marcellense Vanuxem x 



Rockford (James Hall). 



