PLATE XXV. 



Page 

 DoLATOCEiJTUs EXCAVATUs W. and Sp 321 



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



DoLATocEiNus Maeshi, var. iiAMiLTONENsis W. and Sp. . . . 314 



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

 2b. Ventral aspect of the same specimen. 



Dolatoceinus tuberculatus W. and Sp 324 



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



Dolatoceixus speciosus Hall 323 



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

 46. Side view of the same specimen. 



Dolatoceinus majoe W. and Sp 322 



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



Dolatocrixus Lyoxi 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. 



Dolatoceinus canadensis Whiteaves 315 



7a. Dorsal aspect. (After Whiteaves.) 

 7b. Ventral aspect of same specimen. 



Steeeoceinus trtangulatus Barris 325 



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

 81). Side view of same specimen. 



Stereoceinus Barrisi W. and Sp 326 



9«. Side view of a fine specimen. (Same collection.1 



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



^ Centrocrinus pentaspinus Lyon 309 



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

 10/a Side view of same specimen. 



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

 Acfinocrhi us m ulficoimus.) 



