BXPLINATION OF PLATE XSVI. 



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Fig . 1 . Scaphiocrinus rusticellus 212 



Speciti ea witti arms (Keyes collection.) 

 Carboniferons, Lower Burlington limestone. 



Fig. 2. Scaphiocrinus missouriensis 2L1 



Specimen showing arms and ventral sac. (Wachamuth and Springer 



collection ) 

 Carboniferous, Saint Louis limestone. 



Fig 3, Scytalocrinus vanhornei 21S 



Specimen fchowing ventral sac. { Afier Worthen.) 

 Carbociferoas, Saint Louis hmestone. 



Fi G 4 . Barycrinus magnifirus 210 



Side view of calyx. (Cox collection ) 

 Carboniferous, Keokuk limestone. 



Fig, 5 Woodocrinus elegans 214 



Example with aims. (Keyes collection ) 

 Carboniferous, Upper Burlington limestone. 



Fig 6. Hydreionocrinus acanthophorus 215 



Lateral view. (After Meek & Worthen.) 

 Carboniferous, Upper Coal Measures. 



Fig. 7. Cromyocrinus kansasensis 216 



Posterior view of calyx. (Hare collection ) 

 Carboniferous, Upper Coal Measures. 



