TAB. LXIX. 



CORALS OF THE SILURIAN FORMATION. 



Omphyma turbinata (p. 288). 



Fig. 1. Side view of a specimen from Benthall Edge, belonging to the Collection of 

 M. Bouchard-Chantereaux ; natural size. 

 la. Its calice ; natural size. 



Alcervularia. luxurians (p. 292). 



Fig. 2. Under surface of a specimen found at Dudley. 



2a. Upper surface of a specimen from Dudley, belonging to the Collection of 



Mr. Fletcher ; natural size. 

 2d. Calice, magnified. 



2c. Upper surface of the specimen figured in 2 ; natural size. 

 2d. Upper surface of a specimen from Dudley ; natural size. 

 2e. Calices of the same, magnified. 



2/. Some calices of a specimen from Dudley, belonging to the Collection of Mr. 

 Bowerbank ; natural size 



