PLATE XII . 



Unless otherwise stated, the tigures in this and the following plates 

 are of natural size. 



Taxocrinus lobatus, var. (page 94). 

 Figure 1. Side view of the dorsal cup of a specimen from Thedford. 



HoMocKiNirs CKASSUS (page 95). 

 Figure 2. Side view of the dorsal cup of the only specimen collected. 



DoLATocaiNus Canadensis (page 99), 



Figure 3. Basal view of the dorsal cup of the type of this species. Twice the 



natural size. 

 Figure 3((. Summit view of the same specimen, shewing the dome plates. 



Twice the natural size. 

 Figure 35. Outline of the same, as viewed laterally. 

 Figure 3c. Diagram of plates of the dorsal cup of this species. 



Columns of Dolatocriniis (page 101). 



Figure 4. Portion of a column of a species of this genus, as seen from above. 

 Figure 4ci. Lateral view of another portion of a similar column. 



