252 AMPHITRITE. 



PLATE XXXIV. 



FIG. 1. Filipora, filograna, specimen. 



2. Cluster of tubes with the Amphitrite, enlarged. 



3. Amphitrite protruding from a tube. 



4. Plume of eight branchiae viewed in front. 



5. Amphitrite having fallen from its tube. 



6. Another, exposing some internal organization. 



All the preceding figures, except the first, enlarged. 



