TWO PROTECTED NATIVES OF THE ANDAMAN CORAL-REEFS. 



Fig. 9. — Cryptodromia pileifera^ with the commensal sponge beneath which it 

 shelters; seen from the under surface, and enlarged three times. The last two pairs of 

 legs, by which the sponge-cap is held in position, are not visible in this view. 



Fig. 10. — Epinephelus hexagonatus^ the common Coral-perch of the Andaman 

 Islands, much reduced in size. The colour-markings of this fish render it very incon- 

 spicuous against a background of certain kinds of growing coral. 



\To face page 104. 



