180 



Trans. Acad. Sci. of St. Louis. 



synonyms. Forty-two species have been described which 

 can easily be reduced to ten. The following is a list of the 

 species with their synonyms and geological formations. 



I. 



1892. Agaricocrinus Chouteaue?isis, Miller. Chouteau. 



1892. Agaricocrinus Blairi. Chouteau. 



1892. Agaricocrinus germanus. Chouteau. 



1892. Agaricocrinus Sampsoni. Chouteau. 



II. 



1858. Agaricocrinus brevis, Hall. 

 1858. Agaricocrinus pyramidatus. 

 1858. Agaricocrinus stellatus. 

 1860. Agaricocrinus comiculus. 



1860. Agaricocrinus geometricus. 



1861. Agaricocrinus fiscellus. 

 1861. Agaricocrinus corrugatus. 



L. Burlington. 

 L. Burlington. 

 L. Burlington. 

 L. Burlington. 

 L. Burlington. 

 L. Burlington. 

 L. Burlington. 



III. 



1896. Agaricocrinus Adamsensis, Miller and Gurley. 



Burlington 

 1896. Agaricocrinus Hodgsoni. 



Burlington , 



IV. 



1896. Agaricocrinus Illinoisensis, Miller and Gurley, 



V. 



1861. Agaricocrinus injlalus, Hall. 

 1861. Agaricocrinus planoconvexus. 

 1891. Agaricocrinus decomis. 

 1897. Agaricocrinus convexus. 



Burlington. 



Burlington. 

 Burlington. 

 Burlington . 

 Burlington. 



VI. 



1861. Agaricocrinus ornolrema, Hall. U. Burlington. 



1897. Agaricocrinus bellatrema. U. Burlington. 



1897. Agaricocrinus bellatrema, var. major. U. Burlington. 



