PLATE XXIX. 



Page 

 DizYGOCKixLS DODECADACTVLus (Meek aud Wortben) 432 



Fig. la. Lateral view of the calyx. 

 l/i. Posterior view of the same. 

 1 f. \'entral aspect of same. 



Dizvcocuixus ANDKEwsiANus (McCliesnej) 433 



2a. Posterior view of the calyx. 



2b. Lateral view of auother specimen. 



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



2d. Posterior side of a specimen with arms. 



DizYGOCRiNus 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. 



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



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



Batocrinus lauea (Hall) 384 



5a. Large specimen with arms. 



5b. Anterior view of the calyx. 



5c. Lateral view of another sijecimen. 



5d. Posterior view of a more conical specimen, 



EuTKOCHOCRiNus Christyi (Shumard) 409 



6. A young specimen (^). 



Ei'TROCHOCEiNTS LovEi W. and Sp 412 



7. A young specimen {\). 



LoBOCRixrs .^quibrachiatus (iMcChesney) 440 



8'i. Posterior side of the calyx. 



86. Lateral view of another specimen. 



, LoBocRtxus ^quibrachiatus var. asteriscus (M. and W.) . . 441 



9«. Dorsal aspect of the calj^x (anal interradius the lower one). 

 9i. Ventral aspect of the calyx. 



(.\.n specimens in the collection of Wachsmuth and Springer.) 



