Explanation of Plate XXX. 



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Fig . 1 . Eupachycrinus magister 218 



Specimen with Btem (Mas. Mo. Geol. Sur.) 

 Carboniferous, Upper Coal Measures. 



Fig 2 Onychocrinus monroensis 224 



Type example. (After Meek & Worthen.) 

 Carboniferous , Keokuk limestone . 



Fig. 3. Forbesiocrinus agassizi 22t 



Specimen somewhat flattened. (Keyes collection.) 

 Carboni erous, Burlington limestone. 



Fig. 4 Calceocrinus tunicatus , 222 



Type of C robustus. (Cox collection.) 

 Carboniferous, Keokuk limebtone. 



Fig . 5 . Taxocrinus thiemi 223. 



Lateral aspect. (Keyes collection.) 

 Carboniferous, Burlington limestone. 



Fig . 6. Agassizocrinus dactylifornis 221 



6a. Calyx, posterior view. 

 6'o. Basal cup. (Mus. Mo. Geol. Sur.) 

 Carboniferous, Kaskaskia limestone. 



Fig. 7. Ediocrinus pocilliformis 221 



Type (A.fter Meek & Worthen.) 

 Silurian. 



