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c die Keokuk group: Sphenopoterium obtusum und compres- 

 sum, Cyathocrinus angulatus und Saffordi, Zeacrinus planobrachiatus, 

 Onychocrinus monroensis und Norwoodi, Oligoporus Danae, Coscinium 

 Wortheni Prout, tuberculatum, asteria, escharense, Cyclopora fungia 

 und discoidca, Polypora gracilis wie vorige Prout'sche Arten, Camaro- 

 phoria subtrigona, Chonetes planumbona, Atliyris planosulcata Phill, 

 Aviculopecten Oweni, amplus und oblongus, Pleurotomaria Shumardi, 

 Cladodus angalatus, micropus, robustus, turritus, lamnoides, Diplodus 

 duplicatus, incurvus, Antliodus similis, cucullus, politus, minutus, sulca- 

 tus, Chomatodus affinis, pusillus, loriformis, molaris, costatus , elegans, 

 Orodus ornatus, mamillaris, minusculus , minutus, üochliodus crassus 

 und nobilis, Helodus consolidatus, crenulatus, densliumani, denticulatas, 

 elytra, gibbosus, politus, sulcatus, nobilis, Sandalodus angulatus, laevissi- 

 mus, grandis, Psammodus semicylindricus , rhomboideus, Trigonodus 

 minor, Poecilodus rugosus und ornatus, Deltodus stellatus und undu- 

 Jatus, Oracanthus pingens, Drepanacanthus gemmatus und stellatus. 



d. die St. Louis group: Sphenopoterium cuneatum, Dichocrinas 

 eonstrictus, Platycrinus Prattenanus, pennicellus , plenus, Taxocrinus 

 semiovatus, Granatocrinus cornutus, Schoenaster fimbriatus, Coscinium 

 elegans Prout, plumosum Pr, Michelinia Pr, sagenella Pr, Polypora 

 Hallana Pr, Productus scitulus, Myalina concentrica, Yoldia levistriata, 

 Nuculana curta, Dentalium venustum, Straparolus similis, Ortlioceras 

 expansum, Cladodus spinosus, stenopus, magnificus, ferox, Antliodus 

 mucronatus, Dactylodus'princeps und lobatus, Petalodus linguifer, Oro- 

 dus plicatus, Sandalodus spatulatus, parvulus, Psammodus rugosus, Del- 

 todus rhomboideus, Ctenacanthus costatus , Homacanthus gibbosus und 

 rectus, Leptacanthus occidentalis und gracillimus, Carcharopsis Wortheni. 



e. Die ehester group: Megaphytum protuberans, Lepidoden- 

 dron obscurum, costatum , turbinatum, Pterotocrinus crassus und che- 

 sterensis, Archaeocidaris mucronata, Cyclopora polymorpha, Productus 

 parvus, Spirifer glaber, Myalina angulata , Schizodus chesterensis, Stra- 

 parolus planidorsatus, Pleurotomaria chesterensis, Orthoceras annula- 

 tocostatum, Nautilus globatus Swb, chesterensis und speetabilis, Clado- 

 dus zygopus, politus, costatus, grandis, Petalodus linguiier, Antliodus 

 robustus, Dactylodus inflexus, Polyrhizodus dentatus und ponticulus, 

 Chomatodus cultellus, Psammodus reticulatus, porosus Ag, angularis, 

 Aspidodus crenulatus, convolutus, Deltodus cingulatus, Chomatodus an- 

 gulatus. 



3. IndenCoai measures: Neuropterishirsuta, rarinervis Bunb, 

 Eveni, inflata, verbenaefolia , Odontopteris Wortheni, heterophylla, sub- 

 euneata Bunb, aequalis, Sphenopteris paupercula, rigida Brgn, Hymeno- 

 phyllites pinnatifidus, spinosus Gpp, alatus Brgn, hirsutus, Clarki, Ale- 

 thopteris massilonis, crenulata Gpp, stellata, Pecopteris callosa, Cordaites, 

 borassifolia, Selaginites uncinatus, crassus, Lycopodites asterophyllitae- 

 formis, Stigmaria Evani, Sigillaria monostigma, Menardii Brgn, Lepido- 

 dendron diplotegoides, Wortheni, radicans, simplex, Lepidostrobus prin- 

 ceps, hastifolius, Lepidophyllum auriculatum, Lepidophloios obeordatum, 







