PLATE XXXIII. 



Page 



DizYGOCKiNus ORiGiNAKius W. and Sp 421 



Fig. la. The type specimen. 



ll>. Specimen witli one arm paired, the others single. 



Eketmocrinus intermedius W. and Sp . 404 



2a. Side view of a specimen with arms. 



20. Another example. 



2c. Another specimen; top view, showing the spatulate, infolding arms. 



DizYGOCRiNUS MONTGOMEEYENSis (^Yortllen) 428 



3. Specimen with arms, anal tube, and stem ; from Crawfordsville, Ind. 



4. Another specimen with arms (all paired but one) ; from Keokuk, Iowa. 



DizYGOORiNus MONTGOMEEYENSIS var. UNiBEACHiATUs W. and Sp. 429 



5a. A somewhat abnormal specimen with arms and stem. (Coll. L. A. Cox.) 

 5/'. Another specimen with arms. (Same collection.) 

 5c. Posterior view of another specimen. 



DizYGocEiNus iNDiANENSis L. and C 415 



Ga. I'ostero-lateral side of a specimen with arms. 

 Gil. Calyx of another specimen, exposing anal side. 



DiziGOCRiNus INDIANENSIS var. SIMPLEX W. and Sp 415 



7. Anterior view of a specimen with arms. 



DizYGocRixus CANTONENSis W. and Sp 423 



8«. Specimen with portions of the arms, and showing anal tube. 

 8b. Another specimen, showing the arms and anal tube. 



DiZYGOCEINUS BITURBINATUS (Hall) 427 



9. Lateral view of the calyx. 



DizYGOCKixus WiiiTEi W. and Sp 419 



10«. Specimen with arms from the Keokuk group of Bono, Ind. 

 lOi. Lateral view of the calyx. (Same locality.) 



11. Posterior view of the calyx. (Specimen from the Warsaw limestone of 



Kentucky.) 



DiZYGOCEINUS FACETUS Miller and Gurley 418 



12. Specimen from Canton, Ind., showing anal intcrradius. 



(All specimens in the collection of Wachsnuith and Springer, unless other- 

 wise stated.) 



