PLATE LVII. 



Page 

 Cactocrinus nodobrachiatus W. and Sp 622 



Fig. 1. Posterior side of a fine specimen with arms ; the arms incurving and touch- 

 ing the summit of the disk. 



2. Anterior view of another specimen. 



Cactocrinus ornatissimus W. and Sp 621 



3. Posterior view of the type specimen. 



Cactocrinus Arnoldi W. and Sp 624 



4a. Specimen with arms and pinnules (the nodes upon the arms are not pre- 

 served.*) 

 ib. Side view of the calyx, showing the left antero-lateral ray. 



Cactocrinus denticulatus W. and Sp 606 



5a. The type specimen, showing the right posterior ray. 

 5b. Portion of an arm from near the upper end (enlarged). 



Cactocrinus extensus W. and Sp 616 



6. Lateral view of the calyx. 



7. Specimen with arms, anal tube, and column. 



Cactocrinus longus (Meek and Worthen) 609 



8. Anterior view of an unusually fine and large calyx. 



Cactocrinus clarus (Hall) 612 



9. Lateral view of a large dorsal cup with almost smooth plates. 



10. Anterior view of a specimen with ornamented plates. 



Cactocrinus reticulatus, var. ovatus (Hall) 606 



11. Anterior view of the calyx. 



Cactocrinus tiialia (Hall) • 604 



12. Anterior view of the dorsal cup. 



13. Another specimen, showing the left posterior ray and anal interradius. 



(All the specimens in the collection of Wachsmuth and Springer.) 



* This figure is misleading in giving the appearance of spines to some arm-fragments lying upon the 

 disk. 



