TAB. XV. 

 CORALS FROM THE CORAL RAG. 



Stylina Delabechii (p. 79). 



Fig. 1. A small group; the common basal plate has in part lost its epitheca. Natural 

 size. 



1 «. A few corallites magnified, showing the exotheca and some fragments of the 

 epitheca. 



1 h. Calicular surface of the same corallum ; natural size. 



1 c. Calices magnified. 



1 d. Variety with small calices ; natural size. 



GONIOCOKA SOCIALIS (p. 92). 



Fig. 2. A branch embedded in stone ; natural size. 



2 «. A portion of the same magnified, showing the costse and the mode of junction 



of the young individuals on the parent stem. 



2 h. Calice magnified. 



Rhabdophyllia Phillipsi (p. 87). 



Fig. 3. A portion of this compound coral, embedded in stone ; natural size. 



3 «. A fragment of the same magnified, and showing the structure of the costae. 



3 ^. A horizontal section of one of the branches at a short distance from the calice. 

 3 c. A horizontal section of a corallite that is ready to divide by fissiparity. 



