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EXPLANATION OF PLATE 15. 



Page. 



Fig. 1. Coccocrinus conicus (Troost), side view of the specimen figured by Troost 



as Cupellxcrinites conicus 29 



2, 3. Cyathocrinus brittsi Miller and Gurley, side and basal views of Troost's 



type of Cyathocrinites tennesseeae 81 



4. Dimerocrinus roemeri (Troost), side view of the specimen described by 



Troost as Gilbertsocrinites roemeri 101 



5, 6. Eucalyptocrinus goldfussi Troost, side and basal views of Troost's type 



of Eucalyptocrinites goldfussi 52 



7, 8. Eucalyptocrinus nashvillse Troost, side and basal views of Troost's type 



of Eucalyptocrinites nashvillse . 53 



9. Batocrinus gibbosus (Troost), side view of Troost's type of Actinocrinites 



gibbosus 64 



10. Platycrinus saffordi Hall, side view of Troost's type-specimen 39 



11. Batocrinus grandis Lyon, side view of Troost's type of Actinocrinites 



urna 63 



146 



