http://www3.bc.sympatico.ca/kerryw/creature/hooded.htm
this website exists no more:
http://www.biology.ucsc.edu/classes/bio161l/NUDI/mleonina.html
http://www.sfu.ca/~fankbone/v/melibe.jpg
http://colsa.unh.edu/www/zoology/watson/Melibe.html
http://slugsite.us/bow/nudwk188.htm
http://slugsite.us/bow/melmc_8.htm
http://slugsite.us/bow/marc_mel.htm
http://slugsite.us/bow/bruce_m2.htm
http://www.seaslugforum.net/factsheet.cfm?base=melileon
http://www.medslugs.de/E/Pac-NE/Melibe_leonina.htm
http://slugsite.us/bow/nudwk406.htm