Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Arbacioida (ambulacral compounding) Description Half an ambulacrum with arbacioid compound plates.Without scale Author Agassiz, Alexander JPG file - 44.62 kB - 483 x 614 pixels added on 2011-02-23574 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de... © 2011 Agassiz, Alexander Click here to return to the thumbnails overview