PLATE XI"*. 



Echinanthus rosaceus, /. 1, 2. 



1. Seen from abactinal pole, dcmuled, f nat. size. 



2. LongituJiual section, showing pillars connecting the two floors, nat. size. 



Mellita sexforis, /. 3. 



3. Section, showing the course of the alimentary canal, nat. size. 



Echinarachnius, parma, /. •#, 5. 



4. Actinal floor removed, nat. size. 



5. Another specimen, with the abactinal part of test removed, nat. size. 



