34 Coelenterata. 



Indo-Pacific Alcyonarian fauna is characterised by the abundance of dimorphic 

 Alcyoniids (Lobophytum and Sarcophytum), the abundance of Pennatulids and 

 the presence of numerous transition-forms indicating this to be a general centre 

 of dispersion. 



Thomson & McQueen describe, from the Sudanese Red Sea, Clavularia 1, 

 Sympodium 1, Tubipora 1, Xenia 3, Alcyonium 1, Sarcophytum 1, Selero- 

 phytum 3, Lithophytum 5 (2 n.), Nephthya 2, Spongodes 4 (2 n.), Melitodes 2 

 (1 n.), Clathraria 2 and give a provisional list of Red Sea Alcyonarians. 



G. Hydrocorallia. 

 See, supra p 31, Verrill( 3 ). 



