Klem — Tlie Development of Agaricocrinus. 



181 



VII. 

 1861. Agaricocrinus gracilis, Meek and Worthen, 



U. Burlington, 

 VIII. 



1860. Agaricocrinus Coreyi, Lyon and Casseday, 



Keokuk. 

 1882. Agaricocrinus Springeri. Keokuk. 



IX. 



1858. Agaricocrinus Wortheni, Hall. Keokuk. 



1858. Agaricocrinus Wliitfieldi. Keokuk. 



1897. Agaricocrinus conicus. Keokuk. 



X. 



1855. Agaricocrinus Americanus, Roemer. 

 1858. Agaricocrinus tuberosus. 

 1858. Agaricocrinus bullatus. 



1860. Agaricocrinus pentagonus. 



1861. Agaricocrinus excavatus. 

 1869. Agaricocrinus nodosus. 

 1881. Agaricocrinus crassus (?) 

 1881. Agaricocrinus elegans. 

 1890. Agaricocrinus Macadamsi. 

 1890. Agaricocrinus nodidosus. 



1890. Agaricocrinus splendens. 



1891. Agaricocrinus dissimilis. 

 1891. Agaricocrinus Gorbyi. 

 1891. Agaricocrinus Indianensis 

 1895. Agaricocrinus arcula. 

 1895. Agaricocrinus profundus. 

 1895. Agaricocrinus tugurium. 

 1897. Agaricocrinus Americanus, var. tuberosus. 



Keokuk. 

 1897. Agaricocrinus lowensis. Keokuk. 



1897. Agaricocrinus Keokuhensis. Keokuk. 



1897. Agaricocrinus nodidosus, var. Macadamsi. 



Keokuk. 



In conclusion I will offer a few su^orestions as to the fea- 



CO 



tures which seem proper for specific separation. In the pre- 



Keokuk. 



Keokuk. 



U. Burlington. 



IT. Burlington. 



U. Burlington. 



U. Burlington. 



Keokuk. 



Keokuk. 



Keokuk. 



Keokuk. 



Keokuk. 



Keokuk. 



Keokuk. 



Keokuk. 



Keokuk. 



Keokuk. 



Keokuk. 



