PLATE XIII. 



CORALS FROM THE LOWER LIAS. 



Fig. 



1. The corallum of Isastraa Stric/dandi, Duncan. (P. 54.) 



2. A calice, magnified. 



3. The dentations of a septum, magnified. 



4. The strong dissepimental endotheca, magnified. 



5. Part of the corallum oi Septastraa Evesltami, Duncan. (P. 52.) 



6. A calice, magnified. 



7. An irregular and contorted calice, magnified. 



8. The corallum of CyatUoccenia glohosa, Duncan. (P. 55.) 



9. Calices of Cyathoccenia globosa, magnified. 



10. Part of the corallum oi Isastraa insi(;inis,J)\mc?d\. (P. 54.) 



11. A system of four cycles of septa, magnified. 



