What supernatural creature is described as having a swine-like face?

The supernatural creature described as having a swine-like face is referred to as a 'Swinecreature' or 'Thing' in the manuscript. Its face is explicitly noted as being 'the face of a swine' [1].

Further descriptions detail its appearance, stating it had 'a grotesquely human mouth and jaw; but with no chin of which to speak. The nose was prolonged into a snout; thus it was that with the little eyes and queer ears, gave it such an extraordinarily swinelike appearance.' [1]

Space: The House On The Borderland