Explanation of Plate LXXXVI. 



Eucalyptocrinus obconicus Hall, page 301. 

 Fig. 1. Natural mold with the natural cast in position. Xi. 

 Fig. 2. Lateral view of a plaster impression of the natural mold. Xi. 



Crotalocrinus cora Hall, page 292. 

 Fig. 3. Anterior view of a composition impression of the natural mold. Xi. 

 Fig. 4. Posterior view of the natural cast of the same individual. Xi. 



Platycrinus augusta sp. nov., page 292. 

 Figs. 5, 6. Lateral and basal views of a rubber impression of the natural 

 moldfofjthe type specimen. X2. 



Fig. 7. Lateral view of the natural cast of the same individual. X2. 



