]H8().] 



MADRIiPOUARIAN CORAL. 



131 



1 5 



4 5 



15 4 



Fig.l. 



1 5 J, 



5 3 . 



^^-S- 



Fig.3 



Diagrams of the arrangement of tbe septa in tlie five different sj)eoies of 



Stcphanotrochtis. The septa ai-e numbered. 



1. S.nobilis. 2. S. platypus. 3. S.diadema. 4. S.discoides. 5. S.moselej/anu 



