Cnemidiastrum rimulosum sponge from Poland

I've not displayed many sponges on this blog with the only other instance being these specimens from the Waldron Shale. Below is a specimen from the Jurassic of Poland. I purchased it from a seller on E-bay. I think it's classified as a Cnemidiastrum rimulosum but I could be wrong.

Top

Side profile

Underside

Side detail

Rim detail

Inner surface detail

This fossil came from near Zalas, Poland and comes from Oxfordian stage (Jurassic) rocks.