PLATE XXIX. 



Page 



DizYGOCRixus DODECADACTYLus (Meek aud Wortben) 432 



Fig. la.. Lateral view of the calyx. 

 lb. Posterior view of the same. 

 Ic. Ventral aspect of same. 



DizYGocEiNus ANDKEwsiANUs (McChesnej) 433 



2a. Posterior view of the calyx. 



2b. Lateral view of another specimen. 



2c. A specimen with arms, showing one of the postero-lateral rays. 



2d. Posterior side of a specimen with arms. 



DiZYGOCEixus EOTUNDUS (Yandell and Shum.) 431 



3a. Dorsal aspect of the calyx. 



3b. Ventral aspect of the calyx; the plates but slightly convex. 



3c. Ventral aspect of a specimen with distinctly convex plates. 



3d. Lateral view of the calyx. 



3e. Another specimen, having part of the anal tube preserved. 



3/. Side view of a specimen with twenty arms. 



3^. A larger specimen with twenty-two arms. 



4. Ventral aspect of a more discoid specimen (type of Actinocrinus ohlatus Hall.) 



Batocrixus LAURA (Hall) 384 



Ba. Large specimen with arms. 



5b. Anterior view of the calyx. 



5c. Lateral view of another specimen. 



5d. Posterior view of a more conical specimen. 



EuTROCHocRiNus Christyi (Shumard) 409 



6. A young specimen (^). 



EuTEOCHOCRixus LovEi W. and Sp 412 



7. A young specimen (f). 



LoBocRixus ^QuiBEACHiATus (McChcsney) 440 



8a. Posterior side of the calyx. 



8i. Lateral view of another specimen. 



LoBocRTxus ^QUiBRACHiATus var. ASTERiscus (M. and W.) . . 441 



9a. Dorsal aspect of the calyx (anal interradius the lower one). 

 9i. Ventral aspect of the calyx. 



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



