What I think is a tarcrust fungus, possibly Eutypa spinosa (Spiral tarcrust fungus). This was growing on decaying beech logs just a metre away from the log that I found the 'black hand fungus' on. The little black spheres have a rough texture. Where the tree bark has fallen off, they can form large 'rafts', as shown above; where the bark is still in place they can peep out through cracks like this:
Photos taken in Whiteknights Park, Reading University grounds, Reading, UK, on 2011-02-12 and 2011-02-14, respectively.