Fungi/Mould ??

Fungi/Mould ??

Observation - Fungi/Mould ?? - UK and Ireland. Description: On dead Birch, this was slightly bigger than a golf ball and reminded me of an egg without the shell. On the 24 December it looked like it had erupted but I think slugs have taken the top. Have added 2 more photos.

On dead Birch, this was slightly bigger than a golf ball and reminded me of an egg without the shell. On the 24 December it looked like it had erupted but I think slugs have taken the top. Have added 2 more photos.