TAB. X. 

 CORALS FROM THE UPPER GREENSAND. 



Peplosmilia Austeni (p. 57). 



Fig. 1 . Restored figure of the corallum ; natural size. 

 1 a. Calice ; natural size. 



1 b. A broken specimen, showing part of the epitheca, the columella, and the 



structure of the septa. 



Trochosmilia tuberosa (p. 58). 



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



2 a. Calice, magnified. 



Parastrea stricta (p. 59). 



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



3 a. Portion of the calicular surface, magnified. 



MiCRABACIA C0R0NULA (p. 60). 



Fig. 4. Calicular surface ; natural size. 



4 a. Side view, magnified 

 4 b. Calice, magnified. 



4 c. Mural disc, magnified. 



CORALS FROM THE LOWER GREENSAND. 

 HOLOCYSTIS ELEGANS (p. 70). 



Fig. 5. A globose mass of this compound corallum ; natural size. 



5 a. Portion of the calicular surface, magnified. 



5 b. Vertical section, magnified, of the visceral chambers in which the septa have 

 been partly cut away, in order to show the tabular arrangement of the 



dissepiments. 



