PLATE I. 



BlASTUIDOCRINUS CARCHARI.EDENS (page IS). 



Figure \a-\h. Deltoid plates of B. car char icedens. 



" li. Side view of a specimen which has three of the rays partly preserved. 

 " Ik. The same, seen from above. 



" ll. Vertical section, shewing the position of the column in the interior. 

 " Jm. Fragment of the base, shewing the manner in which the column 



penetrates into the visceral cavity. 

 " l7i. Under side of hn. 

 " lo-ls. Small pentagonal crinoidal remains found associated with B. 



carcharicEdens. 



Hybocrinus pristinus (page 23). 



Figure 2a. Left side of a specimen which retains a portion of the column and 

 part of one of the arms. 



Pachyocrinus crassibasalis (page 22). 



Figure 3a. View of the base of the only specimen collected. 

 " 36. Side view of the same. 



Rhodocrinus asperatus (page 27). 



Figure 4a. Side view of a specimen. 

 " 46. View of the base. 



" 4c. A radix found in the same slab along with 4a. 

 " 4rf. Portion of the surface of 4c, magnified. The joints of this column 



appear to be composed near the root of fiv^e pieces each, which 



interlock, as represented in the figure 4c?. 

 " 4e. Transverse section of the column near the root. 



Pal^oceinus striatus (page 25). 



Figure 5a. Posterior side of a nearly perfect specimen. 



" 56. Summit of the same, shewing the ambulaci'al orifices and grooves. 



