EXPLANATION OF PLATE LII. 

 OPHIUROIDE A. 



AmphipJiolis australiana. 

 Fig. 1. — Actinal view, x 16. 

 Fig. 2. — Abactinal view, x 16. 

 Fig. 3. — Side view of two arm-joints, x 16, 



Ojjhiacantha Jbeterotyla. 

 Fig. 4. — Actinal view, x 14. 

 Fig. 5. — Abactinal view, x 14. 

 Fig. 6. — Side view of second and third arm-joints, x 14. 



