TAB. IX. 

 CORALS FROM THE UPPER CHALK. 



Cyathina. laevigata (p. 44). 



Fig, 1, la, lb, Specimens of different forms ; natural size. 



1 c . Calico of the specimen fig. 1 , magnified. It is to be remarked that in this 

 specimen there are only nine pali ; these organs not existing in the half 

 systems, where the septa of the fourth cyclum are not developed. 



1 d. Calice of the specimen fig. 1 b, magnified, and showing the twelve pali and 



the complete fourth cyclum of septa. 



Parasmilia Fittoni (p. 50). 



Fig. 2. Side view of the corallum ; natural size. 



2 a Specimen of a different form, magnified to show the structure of the wall. 



2 b. Calice, magnified. 



CORALS FROM THE LOWER CHALK. 



Synhelia Sharpeana (p. 53). 



Fig. 3. A branch of this compound corallum ; natural size. 



3 a. Portion of the same magnified. 



Stephanophyllia Bowerbankti (p. 54). 

 Fig. 4. Calicular surface ; natural size. 



4 a. Side view of the same, magnified. 

 4 b. Calice, magnified. 



4 c. Mural disc, magnified. 



