PLATE LV. 



Tage 

 ACTISOCRIXUS LOBATUS Hall 557 



Fig. la. Posterior view of a fine specimen ; showing portions of anal tube and arms. 

 (Coll. W. and Sp.) 

 16. Stem near the calyx. 



ACTIXOCKIXUS PEKNODOSUS Hall 5G1 



2(1. Anterior view of the calyx. (Same collection.) 



2(0. Posterior view of another specimen. (Same collection.) 



AcTiNOCEixus MULTiRAMosus "W. and Sp 5C4 



3. The calyx with an Oni/chaster fastened to the anal tube. (Same collection.) 



AcTiNOCRiNus TEXuiscuLPTus McChesuey 571 



4«. Anterior side of a specimen with arms. (Same collection.) 

 ib. Posterior side of the calyx. (Same collection.) 



AcTixocRixus sciTULus M. and W 559 



5. Anterior side of a specimen with arms. (Same collection.) 

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

 6b. Posterior view of the same specimen. 



AcTiNocRiNus AEROsus (S. A. Miller) 577 



7. One of the type specimens. (Coll. F. A. Sampson.) 



8rt. Dorsal aspect of the calyx. (Same collection.) 



8?). Side view of the same specimen. 



He. Ventral aspect of same. 



Cactocrinus obesus (Keyes) 613 



9'i. Side, view of the type specimen. (Coll. Missouri Surv.) 

 9/*. Ventral aspect of the same. (Coll. W. and Sp.) 



Cactoceixus sexaematus (Hall) C15 



10. Left postero-lateral side of the dorsal cup. (Coll. W. and Sp ) 



11. Posterior view of the calyx. (Same collection.) 



Cactocrixus fossatus (S. a. IMiller) 620 



12. The type specimen, sliowing the posterior side of the calyx. (After Miller.) 



