| 189 
 | Fan Bryozoan | Archimedes sp. |  |  | Indiana and Illinois | 
              
                      | 179 
 | Trilobite | Griffithides bufo |  |  | Montgomery County, Indiana | 
              
                      | 192 side view 
 | Sea Lily | Abatocrinus sp. |  |  | Burlington Limestone, Pike County, Missouri | 
              
                      | 192 top view 
 | Sea Lily | Abatocrinus sp. |  |  | Burlington Limestone, Pike County, Missouri | 
              
                      | 196 
 | Blastoid | Cryptoblastus melo and Dichocrinus striatus |  |  | Burlington Limestone, Marion County, Missouri | 
              
                      | 205 
 | Sea Lillies | Aorocrinus immaturus and Platycrinites symmetricus |  |  | LeGrand, Iowa | 
              
                      | 207 
 | Sea Lilly | Taxocrinus |  |  | Edwardsville Formation, Montgomery County, Indiana | 
              
                      | 214 
 | Blastoid | Globoblastus norwoodi |  |  | Burlington Limestone, Burlington, Iowa | 
              
                      | 215 a 
 | Blastoid | Pentremites godoni major |  |  | Wax, Kentucky | 
              
                      | 216 
 | Blastoid | Pentremites obesus |  |  | Chester Formation, Hecker, Illinois | 
              
                      | 218 top view 
 | Blastoid | Pentremites pyriformis |  |  | Wax, Kentucky | 
              
                      | 218 side view 
 | Blastoid | Pentremites pyriformis |  |  | Wax, Kentucky | 
              
                      | 221 
 | Ammonoid (Goniatite) | Muensteroceras parallelum |  |  | Jackson County, Indiana | 
              
                      | 222 
 | Snail | Anematina proutana |  |  | Iowa | 
              
                      | 656 
 | Crinoid | Barycrinus princeps |  |  | Edwardsville Formation, Montgomery County, Indiana | 
              
                      | 663 
 | Sea Lillies | Barycrinus asteriscus and Macrocrinus sp. |  |  | Montgomery County, Indiana | 
              
                      | 669 
 | Sea Lillies | Barycrinus |  |  | Gilmor City Formation, Gilmore City, Iowa | 
              
                      | 670 
 | Crinoid | Scytalocrinus sp. |  |  | Borden Group, Montgomery County, Indiana | 
              
                      | 1053 
 | Crinoidal Limestone |  |  |  | unknown | 
              
                      | 1375 
 | Colony Coral | Lithostrotion proliferum |  |  | unknown | 
              
                      | 191 b 
 | Horn Coral |  |  |  | Iowa | 
              
                      | BrachPr 
 | Brachiopod | Composita sp. |  |  |  | 
              
                      | CrinStems 
 | Sea Lily Stems |  |  |  |  | 
              
                      | PolStn 
 | Crinoidal Limestone |  |  |  |  |