Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Pilematechinus vesica (Challenger Expedition) Description a. Aboral side. b. Oral side. c. Side view. The plates are extremely thin, folding in air by ist own weight. Author Agassiz, Alexander JPG file - 247.77 kB - 1 480 x 725 pixels added on 2009-02-23277 viewsFrom reference Schultz, H. (2009). Sea urchins II: Worldwide irregular d... © 2009 Agassiz, Alexander Click here to return to the thumbnails overview