PLATE XVI. 

 Echinolampas dcpressa Gray. 



Fig. 1 . Seen from above, denuded, natural size. 



Fi_;. 2. The same, seen from the actinal side. 



Fig. 3. The same, seen in profile. 



Fig. 4. Actinostome, enlarged. 



Fij,'. 5. Abactinal system, enlarged. 



Pig. 6. Right anterior ambulacrum, enlarged. 



Interambulacral plates from the actinal side of the test, 

 Lei't interambulacral plates from the area above the ambitus. 



Fi". 9. Anal svstem. 



