List of the echinoderms sent to different institutions in exchange for other specimens, with annotations A Agassiz Bulletin of the Museum of Comparative Zoology, Harvard 1:17-28 (1863) http://biostor.org/reference/60255 Page images from the Biodiversity Heritage Library, http://www.biodiversitylibrary.org/ , made available under a Creative Commons Attribution-Noncommercial License http://creativecommons.org/licenses/by-nc/2.5/