Friday mystery object #146

This week I haven’t had a chance to photograph a new mystery object, so here’s an old image I took of a specimen from a while back:

Any idea what this skull might belong to? I’ve deliberately omitted the scale bar to make it a bit harder, but if you want to see the scale just click on the image.

As usual you can leave your questions, comments and suggestions below and I’ll do my best to respond. Good luck!