40 Trans. Acad. Sci. of St. Louis. 



1. Cribeoblastus cornutus, F. B. Meek and A. H. 



Wortben. St. Louis limestone. 

 Pentremites cornutus, Meek and Worthea. 

 Granatocrinus cornutus, Shumard. 

 Elaeacrinus cornutus, Shumard. 

 Heteroblastus cornutus, EcherHge and Carpenter. 



2. Cribroblastus CURTUS, Shumard. St. Louis limestone. 

 PenP'emites curtus, Saumard. 



Oranatocrinus crirtus, Shumard. 

 Orbitremites curtus, Bather. 



*3. Cribroblastus GRANULOSUS, Meek and Wortlien. Bur- 

 lino;ton limestone. 

 Pentremit'is granulosus, Meek and Worthen. 

 Granatocrinus granulosus, Meek and Worthen. 

 Schizoblastus granulosus, E:ihcridge and Carpenter. 



4. Cribroblastus kirkwoodensis, B. F. Shumard. St. 



Louis limestone. 

 Elaeacrinus kirkiooodensis, Shumard. 

 Cryptoblastus kirkiooodensis, Keyes. 

 Nucleocrinus kirkiooodensis, Miller. 

 Schizoblastus missouriensis, Etheridge anrl Carp'inter. 



5. Cribroblastus LOTOBLASTUS, C. A. White. Lower Car- 



boniferous 2.V. 

 Granatoc7-inus lotoblastus, White. 

 Orbitremites lotoblasCus, Bather. 

 Schizoblastus lotoblastus, Weller. 



It is ver}' doubtful whether this species belongs here. 

 Nothino;, however, can be said until more material has 

 been collected. The only specimen known is the type 

 of "White's description, now in the collection of the 

 Smithsonian Institution, No. 8541. The specimen is 

 much incrusted and does not show an3^thing of the sum- 

 mit openings which are mostl}' covered by foreign matter. 



6. Cribroblastus melo, Owen and Shumard. Burlington 



limestone. 

 Pentremites melo, Owen and Shumard. 

 Granitocrinus melo, Shumard. 

 Elaeacrinus melo, Shumard. 

 Cryptoblastus melo, Etheridge and Carpenter. 



