PLATE XXX. 



Abactinal System of 



1, 2. Salenia Patterson!, copied from A. Agassiz 



3. Salenia varispina, copied from A. Agassiz. 



4. Acrosalenia augularis, copied from De Loriol. 



5. Salenia varispina, copied from A. Agassiz. 



6. 7. Coelopleurus 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. 



14. Arhacia Dufresnii, copied from A. Agassiz. 



