PLATE I. 



DOLATOCRINUS 3IAGNIFICUS, n. 8p 



Fig. I. Basal view of a calyx somewhat injured near middle part. 

 Fig. 2. Vault, a part being broken away. 



Fig. 3. Lateral view of calyx, showing six-armed ray and height of vault. 



DOLATOCRINUS SPINOSUS, U. 8p 



Fig. 4. Basal view of a calyx. 



Fig. 5. Lateral view of calyx showing some of the spines on the plates of the vault. 



Dolatocrinus lacus, Lyon 



Fig. 6. Lateral view of a calyx. 

 Fig. 7. Basal view. 



Dolatocrinus marsht, Lyon 



Fig. 8. Basal view of a calyx. 



