TAB. LXVII. 



CORALS OF THE SILURIAN FORMATION. 



Cyathophyllum articulatum (p. 282). 



Fig. 1. A large specimen found at Dudley, belonging to the Collection of Mr. 

 Fletcher ; natural size. 

 la. A calice, magnified. 



Cyathophyllubi flexuosum (p. 285). 



Fig. 2. A specimen from Much Wenlock, belonging to the Collection of Mr. 

 Bowerbank ; natural size. 

 2a. A corallite found at Malvern, in the Collection of the Geological Society of 

 London, magnified. 



Omphyma Murchisoni (p. 289). 



Fig. 3. Two corallites found at Wenlock, belonging to the Collection of Mr. 

 Bowerbank ; natural size. 

 Sa. Calice, magnified. 

 3/5. Vertical section, somewhat magnified. 



Ptychophyllum partellattjm (p. 291). 



Fig. 4. Side view of a specimen from Malvern, belonging to the Collection of the 

 Geological Society of London ; natural size. 

 4a. Upper surface of the same ; natural size. 



