These egg-like protuberances appear on freshly watered lawns and alongside paths where the soil is compressed from foot traffic. The shaggy mane Coprinus comatus* is a mushroom produced by a fungus that has benefited from human changes to the land. The "eggs" open up into more mushroom-like structures, but almost immediately turn into black liquid. If they are harvested and cooked before this happens they are a mushroom-hunter's delight (I have not tried them myself). I encountered this grouping along with my fungi field walk--when we passed back by it a few minutes later the mushrooms had been flattened by oblivious footsteps.
* Edible dung mushroom