Ormo. 



504 



Ormoceras crebriseptum. Eogers, p. 821, fig. 621, 

 ^ ___..^^.^^-:3'":^-^ Loraine {Hudson river) forma- 



^H tion, (See Hall, Pal N. Y. Vol. 

 F^l, 1847.) 



Ormoceras ? graeile. Hall, Pal. N. Y. Vol. 1, 1849, pi. 

 II 3. 





_ ,. ,..,.^..,....^.^..m^m^mimSm^ 



mi: 



« . 1;.' ■ v. W > ■ "0^ 









?^*Wf^ 



Hall. P^Lv<»lJ, xv// . ilf SRiliS^HIS^^^^^^^S^i^^ 

 18, fig. 3. Blach river formation, II c. 

 Ormoceras tenuifilum. Hall, Pal. N. Y. Vol. 1, 1849, p. 





%:'M'$^^K-&^ 



t*-^ ■ -•v;.').«'5;aeLt . sis* 



■H^L^^^^Mm-^SmMii. 



;: • 1 





■::y 



-■,A.si^Lfci^.»iti5^)s;^;*i; 





16, fig. 1 e. Blade river and Trenton. In Pennsylvania, H. 

 D. Rogers says (Geol. Pa. 1858, p. 817), that it occurs in the 

 Black river division of the Trenton with, but more seldom 

 than, Orthoceras multicameratum. lie, 



Ormoceras vertebratum. Hall, Pal. N. Y. Vol. 2, 1852, 

 pi. 29, fig. 1 a, 1 5, and 1 e. Clinton. Clay pole finds it often 

 abundant in the Ore sandstone^ and Sand-vein ore ied^in Perry 



