196 PROCEEDINGS OF THE ACADEMY OF 



1. Cuniculus hudsonius, (Forst.) Coues. 



Syn. Miifi hudsonius, Forst., Phil. Trans. Ixii, 1772, 379. Pall., N. Sp. 

 Glir. 1778, 201. Gm., Syst. Xat. i. 1788, 137. 



Lemmun hudsonius, Sab., Suppl. Parry's Voy. 1824, 185 ; App. Frank- 

 lin's Journ. 1825, G61. Harl., Fn. Amer. 546. 



Arvicola hudsonia, Rich., App. Parry's 2d Voy., 308. 



Arvicola (^Qeorydms) hudsonius, Rich., F. B. A. i. 1829, 132. 



Myodcs hudsonius, Wagu., Suppl. Schreb. iii. 1843, G04. Midd., Bull. 

 Acad. St. Petersl). iii. xix. Dall, Alaska, 577. 



Georychus hudsonius, Aud. and Bach., Q. N. A. iii. 1853, 81, pi. cxix. 



Mus torquatus. Pall., N. Sp. Glir. 1778, pp. 77 and 205, pi. xi. B. 



Myodes torquatus. Keys, aud Bias. Wirb. Eur. 1840, pp. vi. and 32. 

 Midd., Sib. Reise, ii. 1853, 87, pi. iv.-vii. and x. Baird, M. X. A., 

 1857, 558. 



Mus Unensis, Pall., N. Sp. Glir. 1778, 195. 



Mus grcenlandicAis, Traill, Scoresby's Greenland, 1823, 416. 



Arvicola (Oeorychus) grcenlandicus. Rich., F. B. A. i. 1829, 134. 



Oeorychus grcenlandicus, Aud. and Bach., Q. N. A. iii. 1854, 315. 



Cicniculus grcenknidicus, Wagler, Isis, 1832, 1220. 



Myodes gr<nlandic}i.s, Wagner, Suppl. Schrebcr, 1843, 606. 



Lemmus ungulatus, Baer, Baer and Helm., Beit. iv. 1841, 283. 



Hudson^s Rat and Hare-tailed Bat, Penn., Arct. Zool. i. 132, 133 ; 

 Quad. ii. 201. Hare-tailed Mouse, Hearne, Journ. 387. Hudson''s 

 Bay Lemirdng, A.\\(\. WapisJcooseesick ("White Bear Mouse") of 

 the Crees, Lunaguy {'''y^'h.Me Mouse") of the Chippeways, Aioing- 

 nach ("White Mouse") of the Esquimaux. 



Hah. Arctic regions. 



Genus X. FIBER, Cuvier. 



Syn. Castor, L., S. N. i. 1766, 78 (not type). J/iis, Gm., S. N. i. 

 1788 (not lj^Q).'-'Myocastor, Kerr's Linn., 1792," partly, (type 

 Myopotamus coypus) Fiber, Cuv., Lemons, i. 1800 (type Castor 

 zibethicus, L.). Lemmus, Fisher, Syn. 1829 (partly). Ondatra, 

 Watorh., Charlesw. Mag. iii. 1839 (type zibethicus). 



Obs. Although this well-known form presents many peculiari- 

 ties, these are chiefly in adaptation to aquatic habits ; it is strictly 

 arvicoline in all essentials. 

 1. Fiber zibethicus, (L.) Cuv. 

 Syn. Castor zibethicus, Linn., S. N. i. 1766, 79. 



3his zibethicus, Gm., S. N. i. 1788, 125. 



Myocastor zibethicus, "Kerr's Lum. 1792." 



Fiber zibethicus, Cuv., R. A. i. 1817, 172, and of authors. 



Lemmus zibethicus, Fisch., Syn. 1829, 289. 



Ondatra zibethicus, Watcrh., Charlesw. Mag. iii. 1839, 594. 

 ? Fiber osoyensis, Lord, P. Z. S. 18fi3, 95 (British Columbia). 



Hub. North America. 



