108 ZOOLOGY. 



AEVICOLA (PEDUMYS) AUSTEKUS, LeC. 



Arvicola awstcrm, LEO., P. A. N. S. P., vi, 1853, 405 (Wisconsin). 



Arvicola (Pedomys) amtcrvs, BD.,M. N. A., 1857, 532, pi. liv (Wisconsin and Missouri 



to Louisiana). CODES, Proc. Acad. Nat. Sci. Pbila., 1874, 100. 

 Arvicola (Pedomys) cinnamoma, BD., op. cit., 541, pi. liv (Miuuesota). 

 Arvicola (Pedomys) liaydeni, BD., op. cit., 543 (Nebraska). 



HAB. Western States and adjoining Territories, especially Illinois, Missouri, and 

 Michigan. Kansas. Louisiana. 



AEVICOLA (PEDOMYS) AUSTEKUS CUETATUS, (Cope) Cones. 



Amcola curtata, COPE, Pr. A. N. S. Phila., Jan., 18C8, 2 (Owen's Valley, California). 

 Arvicola paiiperrima, COOPER, Am. Nat., ii, Dec., 1S68, 535 (Washington Territory). 



HAB. United States, west of the Mississippi. California. Colorado. Kansas and 

 Nebraska, where becoming mixed up with true austerm. 



We ascertain, by inspection of the type specimens of both, that Dr. 

 Cooper's species is the same as Prof. Cope's. 



Genus FIBER, Cuvier. 



Cantor, LINN., S. N., i, 1766, 78 (not type). 



Mus, GM., S. N., i, 1788 (not type). 



u Myocastor, KEEK'S Linn., 1792", partly (type, Myopotamus coypus). 



Fiber, Cuv., Ltcons, i, 1800 (type, Castor zibetliicus, L.). 



Lemmm, FISCHER, Syn., 1829 (partly). 



Ondatra, WATERH., Charlesw. Mag., iii, 1839 (type, 0. zibethicus). 



FIBER ZIBETEICUS. (L.) Cuv. 



Castor eibethicus, LINN., S. N., i, 1766, 79. 



Mm sibethicus, GM., S. N., i, 178S, 125. 



Myocastor zibc tliicvs, "KERR's Linn., 1792". 



Fiber zileiMcus, Cuv., E. A., i, 1817, 172; and of authors. 



Lemmm zibethicus, FISCH., Syn., 1829, 289. 



Ondatra sibethu u us, WATERH., Charlesw. Mag., iii, 1839, 594. 



Fiber osoyensis, LORD, P. Z. S., 1863, 95 (British Columbia'). 



HAB. North America. 



Found throughout entire area of North American continent. Seen by 

 members of the expedition, but none secured. Common upon all the streams 

 throughout the Territory of Utah ; a great number being captured every 

 year for their skins, which meet with ti ready sale in Salt Lake City. 



