66 Trans. Acad. Sci. of St. Louis. 



17. Akchaeocidaris Julien. 



1896. a. Radioles a 4 rangees d'epines. Julien, Le Terr. 

 Carb. Marin de la France Centrale, p. 126, pi. 16, 

 figs. 14, 17. 

 Geological formation and locality: Carboniferous, I'Ar- 



doisiere, France. 



18. Akchaeocidaris Julien. 



1896. b. Radioles a 6 rangees d'epines. Julien, \Le Terr. 

 Carb. dela France Centrale, p. 126, pi. ;16, figs. 13, 

 15, 16;pl. 17, fig. 9. 

 Geological formation and locality: Carboniferous, I'Ar- 

 doisi^re, France. 



19. Akchaeocidaris ? Meek and Hayden. 



1859. Archaeocidaris ? Meek and Hayden, Proc. Acad. 



Nat. Sci. Phil., p. 25. 

 Geological formation and locality : Upper Coal Measures » 

 Cottonwood Creek, Kansas. 



20. Archaeocidaris ? Meek and Hayden. 



1859. Archaeocidaris ? Meek and Hayden, Proc. Acad. 



Nat. Sci. Phil., p. 25. 

 Geological formation and locality: Upper Coal Measures, 

 Cottonwood Creek and Manhattan, Kansas. 



21. Archaeocidaris sp. Stacke. 



1877. Archaeocidaris sp. Stacke, Jahrb. K. K. Geol. Reichs- 

 anstalt Wien, bd. 27, p. 318, taf. 1, figs. '13-17. 

 Geological formation and locality: Bellerophonkalk, 

 Siidtirol. 



