Coral forms a thin crust on rock or dead coral. 

 Rather porous. Cups polygonal and about 2.5 mm in 

 diameter. The septa or radial plates have beaded mar- 

 gins. Rare. Known only as one small colony found 

 by Pourtales. 



Encrusting. Cerioid. Porous. Calices 2.5 mm, t)oly- 

 gonal. Columella well developed^ styliform. Septal 

 margins beaded. TVo peritheca. Septa of relatively few 

 simple trabeculae strongly inclined from axis of di- 

 vergence. Exsert. !Afo pali. 

 2. Stephanocoenia michelini (Edwards and Haime). 



Also Stephanocoenia intersepta Vaughan (1919). 

 Also Vlesiastrea goodei Verrill (1902). 



Described by Vaughan (1919), page 357. 



Polyps brown in color. Coral appears very similar 

 to Siderastrea radians. Forms rounded boulders under 

 one foot in diameter. Rather porous. Cups close to- 

 gether but not always touching, and between 2 and 3 

 mm in diameter. Radial septa smooth or very finely 

 toothed. Distinguished from Siderastrea radians by the 

 presence of lobes or pali at the inner edges of the septa. 



Grows throughout the West Indies, the Bahamas, 

 Florida and Bermuda but not very commonly found, 

 possibly because of its resemblance to Siderastrea 

 radians when alive. 



jMassive, subhemispherical. Plocoid or sub-ceriod. 

 Sometimes costate. Calices 2 to 3 mm in diameter. 

 Septa in three cycles. Exsert. Primaries and second- 

 aries with well developed pali. 7ertiaries thin and 

 shorter. Septal marc^ins entire or finely dentate. 

 Columella same height as pali, in form of a compressed 

 style. 7hin, sub -horizontal endothecal dissepiments 

 about 0.5 mm apart. 



74 



