PLATE XXX. 



Abactinal System of 



1, 2. Salenia Pattersoni, copied from A. Agassiz. 



3. Salenia varispina, copied from A. Agassiz. 



4. Acrosaleuia angularis- copied from De Loriol. 



5. Salenia varispina, copied from A. Agassiz. 



6. 7. Ccelopleurus floridanus, copied from A. Agassiz. 



8. Phormosoma placenta, copied from A. Agassiz. 



9. Asthenosoma hystrix, copied from A. Agassiz. 



10. Podocidaris sculpta, copied from A. Agassiz. 



11. Podocidaris prionigera, copied from A. Agassiz. 



12. Phormosoma, copied from A. Agassiz. 



13. Arbacia nigra, copied from A. Agassiz. 



11. Arbacia Dufresnii, copied from A. Agassiz. 



