PLATE XXI. 



Page 



Peeiglyi'Tocixus Billingsi W. and Sji 277 



Fig. la. Posterior view of a specimen with arms and stem. (Voh. John Stewart, 

 now in the Canada Survey Museum at Ottawa.) 

 U. Another specimen in the same collection, showing the left postero-lateral 

 ray and anal interradius. 



Periglyptocrinus priscus (Billings) 278 



2. The type specimen. (Museum Geol. Surv., Canada.) 



Glyptocrixus Dyeri (?) 271 



3a-c. Young specimens, probably of G. Dyeri (f). 



3r/. Type of Miller's Pi/cnocrinus Shafferi (f). (Coll. S. A. Miller.) .... 272 

 3e. Type of Miller's Fi/rnocrhius Shafferi, var. germanus (^). (Same collection.) 

 3/. A somewhat larger specimen (j). (Coll. W. and Sp.) 



Glyptocrixus decadactylus Hall 270 



4«. Inner floor of the dorsal cup (f). (Coll. E. O. Ulrich.) 

 4S. Interior view of the basal cup (f). The angles of the axial canal directed 

 iuterradially. (Coll. W. and Sp.) 



Glyptocrixus Porxsiielli Miller 27G 



5. Interior view of the basal cup (-}-*). The angles of the axial caual directed 

 radially. (Coll. I. H. Harris.) 



Glyptocrixus Dyeri Meek 271 



G. Calyx, showing the posterior side of a large, highly ornamented specimen. 

 (Coll. E. O. Ulrich.) 



CoMPSocEixus MiAMiExsis S. A. Miller 518 



111. The type specimen; posterior side. (Coll. I. H. Harris.) 

 Ih. Anterior view of another specimen. (Coll. W. and Sp.) 



CoMPSocKixus Harrisi S. a. Miller 517 



%a. One of the type specimens; lateral view (|'). (Coll. I. H. Harris.) 

 8/'. Posterior view of another type specimen (f). (Same collection.) 



