PLATE XLIV. 



Page 

 Doeycbinus inteemedius Meek and Worthen 461 



Fig. 1. Specimen with arms, spines, and stem. 



Doeycbinus mississippiensis Kosmer 455 



2. Posterior side of the calyx. 



3. Ventral aspect of a specimen with long spines. 



Doeycbinus GouLDi (Hall) 456 



4. A specimen having the arms and portions of the spines preserved (from 



Indian Creek, Ind.) 



5. Anterior view of the calyx. (Specimen from Kentucky.) 



Doeycbinus coenigeeus (Hall) 458 



6. Dorsal aspect of the calyx. 



7. Ventral aspect of another specimen. 



Aoeoceinus spinosulus (Hall) 478 



8a. Posterior side of the calyx. 



85. Ventral aspect of the same specimen. 



Eeetmocbinus bemibeachiatus, var. expansus W. and Sp. . . . 390 



9. A large specimen, showing the calyx, anal tube, and the infolding of the 

 arms. 



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



