EXPLANATION OF PLATE 5. 



Pag<* 



Figs. 1, 2, 3. Dizygocrinus sacculus (Miller and Gurley), basal, top, and side 

 views of the exterior. The plates of the calyx are incorrectly rep- 

 resented 72 



4, 5, 6. Basal, top, and side views of an internal mold. The number of 

 arms is incorrectly represented in these figures. There are two 

 arms in the anterior ray. These are Troost's figures of Actinocrinites 

 fibula 72 



7, 8. Barycrinus pentasphericus (Troost), basal and side views 84 



9. Agaricocrinus americanus Roemer, basal view, showing deep basal 



excavation. This is one of Troost's figures of Agaricocrinites tuberosus. 58 



10. Platycrinus huntsvillx Wachsmuth and Springer, side view of the 



specimen described by Troost as Platycrinites polydactylus. X 1| 38 



11. 12. Side and basal views of the Platycrinites huntsvillx of Troost. 



XH 38 



13. Eucalyptocrinus milligani Miller and Gurley, side view of the speci- 



men described by Troost as Eucalyptocrinites floridus. Xl§- The 

 elongate plates between the arms are represented as too narrow at 

 the top, and the figure does not show the division of these plates 

 which appears on the specimen 50 



14, 15. Alloprosallocrinus tuberculosus (Troost), side and basal views 69 



16. Dizygocrinus unionensis divalis (Miller), side view of the specimen 



described by Troost as Actinocrinites mortonii 74 



17, 18. Cyathocrinus globosus Troost, side and basal views of the type 



specimen 82 



126 



