Branching colonies, branches thicker than P. divari- 

 cata, but without the swollen ends of P. porites. Cups 

 smaller than in P. pontes. Florida, Bahamas, and the 

 West Indies. 



Ramose. Branches vary in diameter about io mm, 

 ends never dubbed. Calices about i.5 mm in diameter, 

 usually only jive pali. 



17. Porites porites (Pallas), (Plates 9, 10). 



Also Vorites polymorpha Link, (Verrill 1902), also 

 Vorites davaria Lamarck, (Vaughan) . 



Described by Vaughan (1901), page 314. 



This name has been used to include all the branched 

 species of Porites. The question of species versus varie- 

 ties is discussed by Vaughan (1901) . 



Branched, larger branches than P. jurcata, with ends 

 swollen and blunt. Columella and pali usually present. 

 Found throughout the Western Atlantic reef areas, 

 except Brazil. 



Colony forms thick dumps of irregular stout 

 branches, swollen at ends. Calices shallow, deeper on 

 ends of branches, 2 mm in diameter. Columella repre- 

 sented by tubercle and surrounded by six pali which are 

 less developed in the calices at ends of branches. Septa 

 perforate. 



18. Porftes t?ern7// Rehberg. 



Described by Verrill (1902), page 161. 



Massive^ similar to P. astreoides but larger and more 

 solid. Cups deeper, and separated by thicker, more 

 solid and prominent walls. Common on coast of Brazil. 



Larger and more solid than P. astreoides. Calices 

 deeper. Walls more solid, thicker and prominent. Vali 

 rudimentary or absent. Columella large, solid and tu- 

 ber culate, sometimes with slight styliform projection. 



Si 



