A drawing of anatomy of juvenile 5 mm long <i>Haliotis asinina</i> with the shell removed. The mantle tissue is in gray.
Daniel J Jackson, Carmel McDougall, Kathryn Green, Fiona Simpson, Gert Wörheide &amp; Bernard M Degnan
CC BY 2.0
Daniel J Jackson, Carmel McDougall, Kathryn Green, Fiona Simpson, Gert Wörheide &amp; Bernard M Degnan. 2006. <i><a rel="nofollow" class="external text" href="http://www.biomedcentral.com/1741-7007/4/40">A rapidly evolving secretome builds and patterns a sea shell</a></i>. BMC Biology 2006, 4:4. 0doi:10.1186/1741-7007-4-40. Cropped and edited by <a href="//commons.wikimedia.org/wiki/User:Snek01" title="User:Snek01">User:Snek01</a> from <a rel="nofollow" class="external text" href="http://www.biomedcentral.com/1741-7007/4/40/figure/F3">figure 3a</a>.