EXPLANATION OF PLATES. 



The figures show to the best advantage when examined by naeans of a reading-lens of 

 3 or 4 in. diameter. The usual small pocket-lens is not suitable for this purpose. 



PLATE I. 



Figures about ^ nat. size. 

 Fig. A. Madrepora grandis (p. 42) . Palm Island, Great-Barrier Reef. 

 Fig. B. Madrepora grandis, small colony (p. 42) . Rocky Island, Great-Barrier Reef. 

 Fig. C. Madrepora intermedia (p. 31). Maldive Islands. 



PLATE II. 



Madrepora orbicularis (p. 37). Ceylon. § nat. size. 



PLATE III. 



Madrepora multicaulis (p. 48). Ceylon. ^ nat. size. 



PLATE IV. 



Figures about ^ nat. size. 



Fig. A. Madrepora reticulata, upper surface (p. 68) . Amirante Islands. 

 Fig. B. Madrepora reticulata, lower surface (p. 68) . Macclesfield Bank. 

 Fig. C. Madrepora complanata (p. 70). Seychelles. 



PLATE V. 

 Madrepora clathrata (p. 49) . \ nat. size. 



PLATE VI. 

 Figures about ^ nat. size. 



Fig. A. Madrepora clathrata (p. 49). ? Western part of the Indian Ocean. 

 Fig. B. Madrepora clathrata, young colony (p. 49). Mauritius. 

 Fig. C. Madrepora samoensis (p. 143). Samoa. 



PLATE VII. 

 Madrepora oligocyathus (p. 69). Mauritius, f nat. size. 



2e2 



