Plate 21. 



Corals reared from planulae. 



Top row, Favia fragum (Esper), 2 years old and 4 years old. 

 Middle row, Favia fragum (Esper), 1 year old and 4 years old. 

 Bottom, Porites astrcoUlcfi Lamarck, 1 year old and 4 years old. 

 Diameter of the discs, 8 inches. 



2eo 



