JEXPLANATION OF PLATE Lt. 

 PHIUROIDE A. 



Ophiozoua gymnoj)ora. 

 Pig. 1. — Actinal view, x 15. 

 Fig. 2. — Abactinal view, x 15. 

 Fig. 3. — Side view of three arm-joints, x 15. 



Ophiura clenoijliora. 

 Fig. 4. — -Actinal view, x 4. 

 Fig. 5. — Abactinal view, x 4. 

 Fig. 6. — Side view of base of arm. x 4. 



