These are clay representations of Great Cthulhu, the octopus-headed god-monster invented by H.P. Lovecraft.
They are intended to be the kind of primitive religious objects that your average Cthulhu cultist might keep around the house for day-to-day worship rather than images of the fictional character of Cthulhu Itself.
Cthulhu Idol #1
Cthulhu Idol #2
Cthulhu Idol #3
Here they are all together: