PLATE XVI. 
Echinolampas depressa Gray. 
Fig. 1. Seen from above, denuded, natural size. 
Fig. 2. The same, seen from the actinal side. 
Fig. 3. The same, seen in profile. 
Fig. 4. Actinostome, enlarged. 
Fig. 5. Abactinal system, enlarged. 
Fig. 6. Right anterior ambulacrum, enlarged. 
Fig. 7. Interambulacral plates from the actmal side of the test. 
Fig. 8. Left interambulacral plates from the area above the ambitus. 
Fig. 9. Anal system. 
