PLATE XX. 



Page 



Glyptocrinus Dyeri (Meek) 271 



Fig. la. A large specimen with arms. (Coll. I. H. Harris.) 



lb. Posterior view of a large, flattened specimen of the type of Gl. Richardsoni 



Wetherby, showing the fixed pinnules. (Coll. W. and Sp.) 

 lc. The base, showing the angles of the axial canal to be interradial. (Coll. 



Mr. E. H. Vaupel.) 



Glyptocrinus marginatus Billings 275 



2. The type specimen; postero-lateral view. (Mus. Geol. Surv., Canada.) 



Glyptocrinus Eornshelli Miller 276 



3. The calyx and part of the stem. (Coll. I. H. Harris.) 



Glyptocrinus decadactylus Hall 270 



4a. A very large specimen. (After Meek.) 



Ah. Posterior view of calyx. (Coll. I. H. Harris.) 



4,o. Ventral aspect of a rather small specimen (f). (Coll. E. 0. Ulrich.) 



Id. Ventral aspect of an older specimen (f). (Coll. W. and Sp.) 



la. Portions of the arms, showing covering-plates (f). (Same collection.) 



Glyptocrinus ramulosus Billings 273 



5a. One of the type specimens ; lateral view. (Mus. Geol. Surv., Canada.) 

 5b. Another type specimen, showing the ramifications of the arms. (Same 

 collection.) 



Glyptocrinus ornatus Billings 274 



6a. The type specimen ; anterior view. (Mus. Geol. Surv., Canada.) 

 6&. Posterior view of same specimen. 



