This is a stop-motion puppet of the creature "Brown Jenkin" from H P Lovecraft's short story "The Dreams in the Witch House". He is thusly described in the text:
"Witnesses said it had long hair and the shape of a rat, but that its sharp-toothed, bearded face was evilly human while its paws were like tiny human hands. It took messages betwixt old Keziah and the devil, and was nursed on the witch's blood, which it sucked like a vampire. Its voice was a kind of loathsome titter, and it could speak all languages."
Here's the finished film on YouTube:[link]