PLATE XXIX. 



Abactinal System of 



1. Bothriocidaris Pahleni, copied from Schmidt. 



2. Pakechinus elegans, copied from Bailey. 



3. Goniocidaris biserialis, copied from Dbderlein. 



4. Leiocidaris imperialis, copied from Dbderleiu. 



5. Porocidaris Sharreri, copied from A. Agassiz. 



6. Goniocidaris geranioides, copied from A. Agassiz. 



7. Phyllacanthus baculosa, copied from A. Agassiz. 

 8-10. Dorocidaris papillata, copied from A. Agassiz. 



11. Dorocidaris Blakei, copied from A. Agassiz. 



12. Dorocidaris Bartletti, copied from A. Agassiz. 



13. Aspidodiadeina tonsum, copied from A. Agassiz. 



14. 15. Aspidodiadeina Jacobyi, copied from A. Agassiz. 



16. Aspidodiadeina microtuberculatum, copied from A. Agassiz. 



