PLATE XXV. 



Page 



Dolatocrinus excatatus W. and Sp 321 



Fig. 1. Dorsal aspect. (Coll. Victor W. Lyon.) 



Dolatocrinus Marshi, var. hamiltonensis W. and Sp. . . . 314 



2a. Dorsal aspect. (Coll. Victor W. Lyon.) 

 2b. Ventral aspect of the same specimen. 



Dolatoceinus tubeeculatus W. and Sp 324 



3. Dorsal aspect. (Victor W. Lyon.) 



Dolatocrinus speciosus Hall 323 



4a. Dorsal aspect. (Coll. W. and Sp.) 

 ib. Side view of the same specimen. 



Dolatoceinus majoe W. and Sp 322 



5. Dorsal aspect. (Coll. Victor W. Lyon.) 



Dolatoceinus Lyoni W. and Sp 314 



6a. Dorsal aspect. (Same collection.) 



6b. Ventral aspect of another specimen. (Same collection.) 



6c. Side view of the same specimen. 



6d. Portion of the tegmen, showing the slits ; enlarged. 



Dolatocrinus canadensis Whiteaves 315 



la. Dorsal aspect. (After Whiteaves.) 

 lb. Ventral aspect of same specimen. 



Stbeeoceinus teiangulatus Barris 325 



8a. The type specimen. (Museum Davenport Acad. Nat. Sci.) 

 8b. Side view of same specimen. 



Stereocrinus Baeeisi W. and Sp. . 326 



9a. Side view of a fine specimen. (Same collection.) 



9b. Ventral aspect of another specimen. (Coll. W. and Sp.) 



Centeoceinus pentaspinus Lyon • 



10a. The type specimen; dorsal view. (Coll. S. S. Lyon.) 

 10a. Side view of same specimen. 



10c. Side view of another specimen in the Lyon collection. (Described as 

 Actinocrinus multicomus.) 



309 



