In the Ilpirla or Manna totem the members of the clan go to a large boulder surrounded by stones, which are held to represent masses of Ilpirla or the manna of the _mulga_ tree.

A Churinga stone is dug up, which is supposed to represent another mass of manna, and this is rubbed over the boulder, and the smaller stones are also rubbed over it.

While the leader does this, the others sing a song which is an invitation to the dust produced by the rubbing of the stones to go out and produce a plentiful supply of Ilpirla on the _mulga_ trees.

[144] Then the dust is swept off the surface of the stones with twigs of the _mulga_ tree.

Here apparently the large boulder and other stones are held to be the centre or focus of the common life of the manna, and from them the seed issues forth which will produce a crop of manna on all the _mulga_ trees.