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EXPLANATION OF PLATE 6. 



Page. 



Figs. 1, 2, 3. Lobocrinus nashvillx (Troost) (Hall), side, basal, and top views of 



the type-specimen 75 



4. Fragment of the anal tube. 



5. Scaphiocrinus, species undetermined, side view of the specimen de- 



. scribed by Troost as Cyathocrinites planus? Miller. The arms are 

 represented as simple, but the specimen shows that they branch 

 two or more times 87 



6. Periechocrinus ? species undetermined, side view of the arms. This 



specimen was referred by Troost to Actinocrinites moniliformis ? 

 Miller s 79 



7. View of the lower surface of the specimen represented by fig. 6. 



8. 9. Erisocrinust bipartitus (Troost), side and basal views 98 



10. Periechocrinus tennesseensis (Hall), side view of a well preserved 



specimen. This is fromTroost's type of Actinocrinites tennesseese 76 



11. Scaphiocrinus huntsvillx Worthen,side view of a specimen partially 



embedded in the matrix. Figure of Troost's type of Cyathocrinites 



roemeri 86 



128 



