Gentlemen - take a look at Erlingur's first picture. Those two "eyes" look like two blobs of oil on water: one blob "changes" the shape of the other, like a yin/yang symbol.
Also, the blobs in both pictures are actually positioned in what look like horizontal lines, or scratches, across the negative. That's really obvious in the second picture, but also exists in the first.
My guess: a chemical mishap during the process of developing the negatives. Something splattered - a developer chemical? - then the negative was wiped (or dragged) across the blob after the blob did its damage.
Just my 2 krona.
Tom in Connecticut
PS - Erlingur, I have some friends at the Tonmenntaskola. Please say hello to Stefan and Hanna (directors) if you happen to go there.