tern (Plate 1, 9) 6. 



Cups projecting more or less from the cdral surface (Plates 

 2, 3, 22, 28) 8. 



6. Cups have slight rim, are slightly separated by the coral sur- 

 face and are irregular in size and arrangement. Septa are non- 

 porous when viewed under lens (Plate 1) 



?dadracis decaciis (Lyman) 

 Cups not separated but joined by common walls. Septa are 

 porous (Plates 8, 9) 7. 



7. Branches have blunt swollen ends and are over 12 mm wide. 

 Cups shallow and about 2 mm wide (Plate 9) 



Pontes poriXes (Pallas) 



CLUBBED FINGER CORAL 

 Branches not dilated at ends and are under 12 mm wide. 

 Cups deeper and about 1.5 mm wide (Plate 8) 



Porites jurcata Lamarck 



FINGER CORAL 



8. Cups form tubular projections on surface or ends of branches 



(Plates 2, 3, 22) 9. 



Cups low in form, never elongated or tubular (Plate 28) 11. 



9. Tubular cups about 3 mm wide, forming ends of short 

 branches (Plate 22) 



Ctadocora arhuscuta (Lesueur) 



TUBE CORAL 

 Tubular cups under 2 mm wide, scattered all over thick 

 branches which are more than 6 mm thick (Plates 2, 3) 10. 



10. Branches flattened or fanlike (Plate 3) 



Acropora palmata (Lamarck) 

 ELKHORN OR MOOSEHORN 

 CORAL 

 Branches cylindrical (Plate 2) 



Acropora cervicornis (Lamarck) 

 STAGHORN OR DEER HORN 

 CORAL 



11. Coral bushy with numerous short branches usually under 10 

 mm thick. Cups 3-4 mm in diameter (Plate 28) 



Ociilina diffusa Lamarck 

 IVORY BUSH CORAL 

 Coral larger and more open, branches long and crooked and 

 usually over 10 mm thick. Cups may be 3 mm or less in 

 diameter 12. 



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