That splitting cap you would have seen in
Agrocybe species. Not sure which this is, but if it's the one I'm thinking it'll be
Agrocybe praecox- though I'm ready to stand corrected. The second looks like
Lycogala terrestre. The third is the tricky one, and I have no clue, but just for the records I'll have a wild guess at
Melanoleuca sp.
Nick