extend across spaces between cups, which may be more 

 or less blistered in appearance. Florida Reefs, Bahamas 

 and West Indies. 



Calices nearly circular, but angular when crowded, 

 3 to 3.5 mm in diameter, borders often slightly elevated 

 above exotheca. Calices sometimes touching or sep- 

 arated by as much as 2-3 mm. Walls thin, costae 

 thickened, minutely serrulate and never extending 

 across exothecal spaces. Exotheca smooth or vesicular. 

 Septa 12 to 2 4, i 2 extend to columella. Jhose of third 

 cycle bend toward and join the larger ones. Septa thin 

 at columella, thickened at wall, inner edge serrulate, 

 sides roughly granulated. Small paliform lobes. Col- 

 umella small, of small twisted septal processes. 

 33. Tdontastrea annularis (Ellis and Solander) , (Plates 

 25, 26). 



Also Orbicella annularis, (Vaughan 1919), also 

 Orbicella hispidula (Verrill 1902), also Orbicella 

 acropora (Linnaeus), (Vaughan 1901). 



Discussed by Vaughan (1919), page 365. 



Grows into boulders 5 feet or more across, forming 

 one of the principal reef forming corals of the West 

 Indies. Sometimes more encrusting or more irregular 

 m shape. Yellow brown in color. Cups circular, 2 to 

 2.5 mm in diameter and an average of 1 mm apart. Rims 

 slightly projecting. Septa prolonged across space be- 

 tween cups. Florida, the Bahamas, the West Indies 

 and Bermuda. 



Calices more or less circular, diameter varies, 2 mm 

 to 2.5 mm, margins more or less raised above exotheca, 

 0.5 to 2 mm apart. Costae corresponding to all septa, 

 edges dentate, those of adjoining calices meeting. Septa 

 in three complete cycles, those of first two ediual, fusing 



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