PLATE IL. 
Fig. 1. |Puaryceras veNnTRicosum, Conrad. Viewed from above. Nat. size. (p. 115.) 
la. Portion of the surface, enlarged. 
Fig. 2. Puaryceras INTERMEDIUM, Hall (2). Nat. size. (p. 115.) 
Fig. 3. SrropHosty.us (?) sup-GLoposus, Nich. Nat. size. (p. 118.) 
3a. Portion of the surface of the same, enlarged. 
Fig. 4. Puaryostoma ventTricosa, Conrad. Nat. size. (pi Tit 
Fig. 5. PLATYCERAS UNISERIALE, Nich. Nat. size. (p. 116.) 
Fig. 6. Puaryceras sp.- Nat. size. (p. 116.) 
Fig. 7. Puaryceras sp. Mat. size. (p. 116.) 
Fig. 8. Heicoroma(?) serotina, Nich. Nat. size. (p. 120.) 
8a. The same viewed from above. 
Fig. 9. Hutopea Eriensis, Nich. Nat. size. (p. 120.) 
Fig. 10. SrropHosryuus (?) ovatus, Nich. Nat. size. (p. 118.) 
10a. Portion of the surface of the same, enlarged. 
Fig. 11. Srropuostryzus (?) opziquus, Nich. Dorsal aspect, nat. size, (p. 119.) 
lla. Front view of the same, nat. size. 
