PLATE LV. 



Page 

 ACTINOCEIXUS LOBATUS Hall 557 



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

 (Coll. W. and Sp.) 

 U. Stem near tlie calyx. 



ACTIXOCRIXUS PEENODOSUS Hall 561 



2(7. Anterior view of the calyx. (Same collection.) 



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



AcTiNOCRiNus MULTiEAMosus W. and Sp 564 



3. The calyx with an Onychaster fastened to the anal tube. (Same collection.) 



AcTiNOCEiNus TENuiscuLPTus McChesney 571 



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

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



AcTixocEiNus sciTULus M. and W 659 



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

 6«. Side view of the calyx. (Same collection.) 



66. Posterior view of the same specimen. 



AcTiNOCEiNus AEEOSus (S. A. Miller) 577 



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

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



86. Side view of the same specimen. 



'S:c. Ventral aspect of same. 



Cactocrinus obesus (Keyes) 613 



9«. Side view of the type specimen. (Coll. Missouri Surv.) 

 96. Ventral aspect of the same. (Coll. W. and Sp.) 



Cactocrintts sexaematus (Hall) 615 



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. Miller) 620 



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



