﻿EXPLANATION OF PLATE XXL 



Fig. I. Spirastrella poculoides, sp. nov. ; x 7/10. 



The specimen, which has been longitudinally bi- 

 sected, is viewed from the inner surface. 

 Fig. 2. Spirastrella alcyoni aides, sp. nov. ; x 3/^5. 

 Fig. 3. Spirastrella montijormis, sp. nov. ; x 5/6. 



The surface markings are traces left by an en- 

 crusting^ Cornulariid Alcvonarian. 



