ANTHOZOA 



149 



M. sinuosa Lesueur (Platygyra viridis Les.) (Fig. 246). Brain- 

 coral. Colony incrusting and massive, 25 cm. in diameter or more; 

 surface made 

 up of numerous 

 sinuous ridges, 

 which are the 

 septa, and 

 grooves: West 

 Indies and 

 Florida. 



DIVISION 3. 

 rUNGACEA. 



Solitary or 

 colonial corals 

 in which the 

 septa are join- 

 ed by cross 

 bars or synap- 

 ticula: 5 fami- 

 lies. 



Fig. 246 M eandrina sinuosa (Vaughan). 



FAMILY 1. PLESIOFUNGIIDAE. 



Coral solitary or colonial, with additional ridges (dissepiments) 

 on the inner wall of the cup between the septa : about 15 genera. 



SlDERASTRE A* 



Blainville. Colony with 

 distinct zooids, crowded 

 and more or less polyg- 

 onal, and forming 

 rounded, unbranched 

 masses. 



S. radians (Pal- 

 las). Cups about 3 mm. 

 by 2 mm., rounded, with 

 the fourth cycle of septa 

 incomplete : West Indies. 



S. siderea (Ellis 

 and Solander) (Fig. 



Fig. 247 Siderastrea siderea (Vaughan), 



247). Cups about 5 mm. by 4.5 mm., subhexagonal, with 4 complete cycle 

 of septa: West Indies. 



* See "The Coral Siderastraea," by J. E. Duerden, Pub. Cam. Inst, No. 20, 1904. 



