PLATE VIII. 



Edeioaster Bigsbti (page 82). 



Figure 1. Upper side of a specimen partly embedded in stone. 



^' la. A polished section through the mouth and two of the grooves, showing that 



the pores penetrate through. 

 " 2. Fragment of a crushed specimen, showing two of the rays. 

 " 2a. A portion of iigure 2 enlarged to show the pores. 



Agelacrinites Dicksoni (page 84). 



Figure 4. The original specimen discovered by Dr. Bigsby, now in the Museum of 

 Practical Geology, Jermyn Street, London. 

 " 4a. The same enlarged. 



" 3. View of a different specimen, in collection Geological Survey of Canada. 

 " 3a. The same enlarged. 



