Half a Ring of Funnels Clytocybe nebularis
These were in chalk grassland on 24 November.
The caps are about a hand-span across. I didn't get a closser look to see if there were traces of the other half of the ring.
Olympus EM-1, (aperture priority), Olympus 4/3 50mm f2 macro, 1/60 at f11 ISO 1600, hand-held.
The stereo is crosseye.