PLATE V. 



LIASSIC CORALS FROM THE SUTTON STONE AND BROCASTLE. 



Fig. 



1. Astroccenia plana, Duncan. (P. 19). The corallum, natural size. 



H. Astroccenia gibbosa, Duncan. (P. 18.) A coralluni, with much coenenchyma. 



3. A coralhuii somewhat worn. 



4. The usual appearance of the Coral in the Sutton Stone ; all the calices have been 



worn away, and it requires some trouble to distinguish the fossil. 

 12. A section at right angles to the corallites, highly magnified. The columella, the 

 faint lateral dentations of the septa, and the round ornamentation between the 

 costal ends are shown. 



5. Astroccenia parasitica, Duncan. (P. .20.) 



6. The same, magnified. The Coral is parasitic on TlhahdophyUia recondita. 



7. Astroccenia pedunculata, Duncan. (P. 20.) The corallum, magnified. 



8. The corallum, natural size. 



9. A view of the peduncle and base, magnified. 



10. CyathoccBnia costata, Duncan. (P. 29.) The corallum, natural size. 



11. Some calices, magnified. 



