Pseudocerotidae sp. 13  Family: Lang, 1884

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I had been scanning through all websites on MARINE FLATWORMS, but I did not find a picture of a similar species, maybe there are some at NUDIPIXEL within the -as of 17 September 2012- 627 Unidentified polyclad flatworm pictures.
I label it Pseudocerotidae sp. 13, because my best guess is that it should be placed in the family Pseudocerotidae  Lang, 1884.
It is characterized by a mottled orange-brownish colour and a whitish-cream band at the mantle margin with a transcendent rim - except of the dark brown to black margin at the Pseudotentacles.