http://slugsite.us/bow/nudiwk36.html
http://slugsite.us/bow/pacific/pardus.html
this website exists no more:
http://www.biology.ucsc.edu/classes/bio161l/NUDI/jpardus.html
http://www.seaslugforum.net/showall/jorupard
http://www.nudipixel.net/species/jorunna_pardus/