PLATE XII*. 



Encope emarginata, /. 1-3. 



1. Ramifications of interambiilacral part of abactinal limestone floor. 



2. Part of test covering ambulacra removed, sliowing isolation of ambulacra from rest of the main 



cavity. 



3. Abactinal part of test removed, showing teeth in situ and course of the alimentary canal. 



Encope Michelini, /. 4. 



4. Section similar to fig. 3, to show differences of the interior cavity between the two species. 



(All fifjs. f nal. size). 



