138 TABULATE CORALS. 



flat surfaces (PL VII., fig. i c), show the visceral chambers of 

 the (here) thin-walled tubes to be crossed by remote and com- 

 plete tabulae, and to be connected by a well-developed system 

 of circular mural pores. 



Fomnation and Locality. — Not uncommon In the Wenlock 

 Limestone of Benthall Edge, Longhope, Dudley, and Stoke- 

 Edith. 



