158 TABULATE CORALS. 



added that the reference of the genus by Milne-Edwards and 

 Haime to the Halysitida t in the vicinity of Syringopora, is based 

 upon a solid foundation of structural likeness, since the connect- 

 ing-floors of Chonostegites are the homologues of the hollow 

 connecting-tubes in Syringopora, and the genus thus forms a 

 true link between Michelinia and Syringopora. 



Formation and Locality. Not uncommon in the Corniferous 

 Limestone of Walpole, Ontario. 



