I remember seeing a film when I was young (in the 70’s). It was black and white. All I really remember about it is that some astronauts encounter some kind of brain creature. There is some conversation (it speaks telepathically), and it ends up eating one of them. I have been searching for a while to find out what movie it is, without any luck.
Journey to the 7th Planet
1962. I think it was in color though.
This is it, isn’t it?