PLATE LXVIL 



Page 



Platycbinus Saffordi Hall 694 



Fig. 1. A fine specimen with arms and column, from Indian Creek, Ind. (Coll. 

 W. and Sp.) 



2. Side view of the calyx. (Same collection.) 



3. Dorsal cup of a specimen from Burlington. (Same collection.) 



Platycrinus glyptus M. and W 693 



4. Specimen with arms and column. (Coll. W. and Sp.) 



5. Dorsal cup of a large, elongate specimen. (Same collection.) 



Platycrinus incomptus White , 664 



6. A young specimen with arms, showing the numerous bifurcations of the rays, 



and a faint rugose ornamentation. 



Platycrinus spinifbr, var. elojstgatus W. and Sp. 709 



7. Lateral view of the calyx, showing portions of the arms. (Same collection.) 



Platycrinus cayus Hall 715 



8a and b. Dorsal cup of two specimens. (Same collection.) 



Platycrinus Wortheni Hall 702 



9. The type specimen. (Illinois State collection.) 



Platycrinus geometricus W. and Sp 697 



10. The type specimen. (Mus. Comp. Zool.) 



Platycrinus truncatulus Hall 675 



11a. Side view of the calyx, showing the bases of the arms (enlarged). 

 115. Side view of another specimen. 



