NO. 1850. 



KXOn STONE CRINOID FAUNA— SPRINGER. 



207 



Table of genera, and a few species occurring at the Knobstone localities and Whites Creek. 



2^ 



aW 



Whites 

 Creek. 



Gilbertsocrinus tenuiradiatus 



Eretmocrinus rainulosus 



Eretmocrinus praegravis 



Eretmocrinus yandelU 



Dorycrinus gouldi 



Lobocrinus nashvillae 



Agaricocrinus americanus 



A garicocrinus nodulosus 



A Uoprosallocrinus 



Megistocrinus 



A mphoracrinus 



A ctinocrinus 



Cactocrinus 



Platycrinus, discoid 



Platycrinus, other 



Wachsmuth icrinus 



Mespilocrinus 



Metichthyocrinus 



Forbesiocrinus (nobilis type) ... 

 Forbesiocrinus (wortfieni type). 



Taxocrinus 



Eurijocrinus 



Synoathocrinus 



Halysiocrinus 



Catillocrinus 



Cyathocrinus 



Barycrinus 



Poteriocrinus 



Scaphiocrinus 



Stemmaiocrinus 



Orophocrinus 



Schizoblastus 



X 



Not found elsewhere 

 X 

 X 

 X 

 X 

 X 



X 



X 



St.L 



Recapitulating these data, we have: 



Whites Creek. 



Knobs. 



Mixed. 



Keo- 

 kuk in 

 situ. 



Genera or particular species occurring — 



Not later than I>ower Burlington 



Not later than Upper Burlington 



Klnderhook or Lower Burlington to Keokuk 



Not earlier than Upper Burlington or Keokuk. . 



Others not defmitely comparable 



In Mountain Limestone of Britain and Belgium 



These figures tell their own story better than pages of argument, 

 which is that the main fossiliferous beds of the Knobs, and the lower 

 limestone above the Black Slate at Whites Creek, must be placed 

 stratigraphically as equivalent in part or closely related to the 

 Lower Burlington. That some important Lower Burlington species 

 are not found here, or that there may be a slight intermingling of 

 Upper Burlington forms, does not interfere. I think there can be no 

 doubt that the typical region of the crinoidal formation, namely, 



