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EXPLANATION OF PLATES L. AND LI. 



Fig. 1. Telesto rupicola. Colony x 2. The upper portion is covered by a commensal 

 sponge througii which the expanded polyps project. 



Fig. 2. Spicules of Telesto rupicola. 



Fig. 3. Telesto arthuri, n. sp. Colony x 2. 



Fig. 4. Spicules of Telesto arthuri. x IG. a. end of .spicule showing size of warts, x 112. 



Fig. 5. Spongodes semperi. Colony x 2. 



Fig. 6. Spongodes semperi. Tip of branch, showing arrangement of spicules. 



Fig. 7. Spicules of Spongodes semjieri. 



