http://www.vibrantsea.net/hedgpethi23_barkley4.html
http://slugsite.us/bow/pan/elysia_h.html
http://www.medslugs.de/E/Pac-NE/Elysia_hedgpethi/Selection.htm
http://www.medslugs.de/E/Pac-E/Elysia_hedgpethi/Selection.htm
http://sacoglossa.lifedesks.org/pages/344