PLATE XXI. 



Hexacrinus interscapulars, Phillips, sp. (Page 190.) 



Fig. 



1. Phillips's original type, side view showing the anal plates. 1 a, and 1 b, front 



and rear views, indistinctly showing the primibrachs. 1 c, ventral view. 

 1 d, dorsal view, showing the very small comparative size of the column. 

 (The anal, which is the lower plate to the left, is here drawn slightly too 

 wide.) Wolborough. Museum of Practical Geology. 



2. A large distorted specimen, with an extremely elevated tegmen. Wolborough. 



Museum of Practical Geology. 



3. Another specimen, with a very shallow cup and unusually fine and thick cor- 



rugated ornament ; showing the anal plates. 3 a, dorsal view, showing that 

 the column was comparatively large. Wolborough. Vicary Collection. 



4. An unusually large example, with crowded ornament showing two radials. 



4ff, dorsal view. Wolborough. Vicary Collection. 



