On Wed, 26 Feb 2014 22:36:26 +0000, Spider wrote:

snip


Definitely a fungus. I have seen it many times since I have two cats.
Kay is probably right with her 'Phycomyces' fungus. It is simply
breaking down the cat poo, and is best left to get on with it.


Looking on it positively - at least it marks the spot where I need to
remove the excrement ;-)

Cheers all