PLATE XI. 



LIASSIC CORALS FROM LUSSAY, IN SKYE, AND MARTON, NEAR GAINSBOROUGH. 



Fig. 



1. Isastraea Murchisoni, Wright. (P. 41.) 



2. Calices, magnified. 



3. A calice, magnified. 



4. A septum, magnified. 



.5. Septastraa Fromenteli, Terquem et Piette. (P. .37.) Some fissiparous calices, 

 slightly magnified. 



