_Type._--Obtained on the Shesley River, British Columbia, by M. P. Anderson on August 23, 1902; type in American Museum of Natural History. _Measurements._--A female from Sherman Creek Pass, Ferry County, measured: total length 770; length of tail 250; hind foot 95; ear 37. A female from Tye, King County, measured: 930; 280; 125; weight 20 pounds. _Distribution._--Forested parts of the state, exclusive of the Blue Mountains. _Remarks._--Porcupines are extremely rare west of the Cascades but are occasionally reported from as far west as the Olympic Peninsula. =Myocastor coypus= (Molina) subsp? Coypu, nutria _Mus coypus_ Molina, Sagg. Stor. Nat. Chili, p. 287, 1782. _Myocastor coypus_ Kerr, Anim. Kingd., p. 225, 1792. _Type locality._--Chile. _Description._--Size large, slightly smaller than a beaver; color rich, reddish brown; tail long, round; hind feet webbed for swimming. _Remarks._--The nutria, a native of South America, has been brought to the United States and raised commercially on "fur farms." The species has become established in the wild in several localities in western Washington and at the Colville Indian Reservation in northeastern Washington. For further details see Larrison (1943). =Ochotona princeps= (Richardson) Pika or cony _Description._--The pika is of guinea-pig size, with a short, chunky body about 200 mm. in length. The tail is represented externally merely by a tuft of white fur. The short, wide head has large, circular ears, large black eyes, and long whiskers. The legs are short and the soles of the feet are furred. The color of the Washington races varies from grayish-yellow to dark reddish brown. Like rabbits, all pikas have two pairs of upper incisors. The second pair, located just in back of the first, is small and delicate. _Ochotona_ is a wide-ranging genus with many more species in Asia and extreme eastern Europe than in North America. Three races of the species _princeps_ occur in the state of Washington, where they are confined to the Cascade, Kettle River, and Pend Oreille Mountains. The ranges of all three races extend northward into British Columbia; one (_brunnescens_) occurs also in Oregon, and one (_cuppes_) in Idaho.