It is the duckbill or duckmole, and is scientifically known as the ornithorhynchus paradoxus.
"The Human Side of Animals"
Royal Dixon
It was described as about two feet in length, with coarse grizzly hair; and must have more nearly resembled the otter or badger than the beaver or the ornithorhynchus, which the first accounts seem to suggest as the probable type.
"The Romance of Natural History, Second Series"
Philip Henry Gosse
93. Echidna setosa 6:1 6:2. ornithorhynchus hystryx var.
"Journals Of Two Expeditions Of Discovery In North-West And Western Australia, Vol. 2 (of 2)"
George Grey