PLATE LXXXVI 



PAGE 



Figs. 1-3. PLATYCERAS SUBCONICUM Ohern n. sp 479 



1, 2. Views of type. 



3. Individual with low folds. 



Oriskany formation, Ridgely member, Cumberland. 



Fig. 4. PLATYCERAS NEWBERRYI Hall 479 



Side view. Oriskany formation, Ridgely member, Warren Point, Penna. 



Figs. 5-7. STROPHOSTYLUS TRAXSVERSUS Hall 480 



Upper, ventral, and oblique views. Oriskany formation, Ridgely mem- 

 ber, Cumberland. ( After Hall. ) 



Figs. 8, 9. STROPHOSTYLUS MATHERI Hall 481 



Dorsal and ventral views. Oriskany formation, Ridgely member, Cum- 

 berland. (After Hall.) 



Fig. 10. STROPHOSTYLUS ANDREWSI Hall 481 



Ventral view. Oriskany formation, Ridgely member, Cumberland. 

 (After Hall.) 



FigS. 11, 12. DlAPHOROSTOMA DEPRESSUM (Hall) 482 



Lower and dorsal views. New Scotland formation, New York. 



Figs. 13, 14. DIAPHOROSTOMA DESMATUM Clarke 483 



Upper and ventral views. Oriskany formation, New York. 



77 



