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



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



Worthen. St. Louis limestone. 

 Pentremites cornutus, Meek and Worthen. 

 Granatocrinus cornutus, Shumard. 

 Elaeacrinus cornutus, Shumard. 

 Heteroblastus cornutus, Etheridge and Carpenter. 



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

 Pentremites curtus, Shumard. 



Granatocrinus curtus, Shumard. 

 Orbitremites curtus, Bather. 



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

 lington limestone. 

 Pentremites granulosus, Meek and Worthen. 

 Granatocrinus granulosus, Meek and Worthen. 

 Schizoblastus granulosus, Etheridge and Carpenter. 



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



Louis limestone. 

 Elaeacrinus kirkiooodensis, Shumard. 

 Cryptoblastus kirkwoodensis, Keyes. 

 Nucleocrinus kirkwoodensis. Miller. 

 Schizoblastus missouriensis, Etheridge and Carpenter. 



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



boniferous gr. 



Granatocrinus lotoblastus. White. 

 Orbitremites lotoblastus, Bather. 

 Schizoblastus lotoblastus, Weller. 



It is very doubtful whether this species belongs here. 

 Nothing, 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 anything of the sum- 

 mit openings which are mostly covered by foreign matter. 



6. Cribroblastus melo, Owen and Shumard. Burlington 



limestone. 

 Pentremites melo, Owen and Shumard. 

 Granatocrinus melo, Shumard. 

 Elaeacrinus melo, Shumard. 

 Cryptoblastus melo, Etheridge and Carpenter. 



