Found a folder of images of unidentified slime mould from 2016 (I probably forgot to work on it) and now I a, trying to label it.
Myxocarp flattened (depressed) greyish-white, covered with lime granules, having a short beige-light brown stipe. Capillitium with many, bulky/large lime granules. Spores seem to be minutely spinulose with at least one pale patch (halos) looking like a crater (sometimes with ridges ?), (9.5)10-11um diameter.
If other measurements are required , let me know.
I was thinking that it is Physarum album.