Nutria Fur. The fur of an animal of the genus rodent, somewhat resembling both the musk-rat and the beaver. It is smaller than the latter, but larger than the former. It inhabits the banks of the rivers in Buenos Ayres and Chili, being a kind of water rat. Nutria skins are dressed and dyed as a substitute for seal-skin, and the fur is used in the manufacture of hats as a substitute for beaver, which of late years has grown scarce. [See Furs, Hats and Caps]