PLATE LVII. 



Page 

 Cactocrixus 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. 



Cactocrixus ornatissimus W. and Pp C21 



3. Posterior view of the type specimen. 



Cactocrixus Arnoldi W. and Sp C24 



4«. Specimen with arms aud pinnules (the nodes upon the arms are not pre- 

 served.*) 



4i. Side view of the calj'x, showing the left antero-lateral ray. 



Cactocrixus dexticulatus W. and Sp 606 



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

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



Cactocrixus extensus W. and Sp 61G 



6. Lateral view of the calyx. 



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



Cactocrixus loxgus (Meek and Worthen) 609 



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



Cactocrixus clarus (Hall) 612 



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



10. Anterior view of a specimen with ornamented plates. 



Cactocrixus reticulatus, var. ovatus (Hall) 606 



11. Anterior view of the calyx. 



Cactocrixus tiialia (Hall) _ , 604 



12. Anterior view of the dorsal cup. 



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



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



* This figure is misleading iu giviug the appearance of spines to some arm-fragmeuts Iviug upon the 

 disk. 



