PLATE LXXI. 



Platyceinus ixcomptus White 064 



Fig. 1. A very large specimen, showing the numerous ramifications of the arms. 

 (Coll. W. and Sp.) 



2. A small specimen, showing the same. (Same collection.) 



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



Plattcrinus tequalts Hall G7i 



4a. A very large specimen with arms. (Same collection.) 

 ib. Portion of an arm (enlarged). 



5. The calyx, showing the radial facets and the small first costal. (Coll. W. 



and Sp.) 



Platycrinu.s lodensis Hall and Whitf GOO 



6. The type specimen. (After Hall and Whitfield.) 



Platyckinus GRAPnicus Hall and Wliitf C7l' 



7. The type specimen. (After Hall and Wliitfield.) 



Platycrixus coxtritus Hall and Whitf 007 



8. The type specimen. (After Hall and Whitfield.) 



Platycrixus niotensis Meek and Worthen GS2 



9. Specimen with arms (from Indiana). 



Platycrixus Brittsi S. A. Miller Co9 



10. The type specimen. (Coll. F. A. Sampson, Sedalia). 



Platycrixus corbuliformis Kowley and Hare 0."i7 



11a. Dorsal cup in a side view. 



lib. Dorsal aspect of the same specimen. (Coll. P>. Tl. Kowle}-.) 



Platycrixus .equiterxus S. A. Jliller 6.58 



12. The type specimen. (Coll. F. A. Sampson.) 



Platycrixus i-isum Rowley and Hare GOii 



13a. The type specimen ; posterior view. (Coll. E. K. Rowley.) 

 13b. Dorsal aspect of same. 



