ties not completely fused with skull (exceptions to this are the swamp 

 hares which have this process anchylosed to the cranium by its tip, or 

 its internal margin); all the openings of the skull are large; facial sur- 

 face of the maxilla reticulated; orbits very large, meeting in the mesial 

 line of the cranium; teeth more numerous than in any other family of 

 rodents; second pair of upper incisors small, situated behind the 

 chief pair; the latter is grooved deeply in front, and all are deeply 

 implanted in the jaws; molars rootless; third upper molar minute; 

 last lower molar larger, but still much the smallest of the lower series. 

 The scapula ends in a process, which has near its termination a band 

 directed at right angles to the scapula; tibia and fibia always anchy- 

 losed; front feet with five toes, hind feet with four. A patch of hair- 

 covered skin on inner surface of cheeks extending backward from the 

 angle of mouth. Hind legs elongated, in some species greatly so. 



412. arcticus. {Lepus), Leach, in Ross Voy. Arct., Reg., 11, 1819, 

 App., iv, p. 151. 



glacialis, Leach, in Ross Voy. Arct., Reg., 11, iSig, App., iv, 

 p. 170. 



timidus 'liar, arcticus, Allen, Mod. Rod., 1876, p. 288. 



Type locality. Shores of Baffin Bay. 



Geogr. Distr. Newfoundland, Labrador, west shore of Hudson 

 Bay, north shore of Great Slave Lake and Barren Grounds to the 

 Arctic Ocean; west of the mountains in the Upper Yukon Valley. 



Gcnl. Char. Size very large; ears four-fifths the length of head; 

 hind foot longer than the head. Total length of skull twice the 

 greatest breadth. 



Color. Summer Pelage. White, mixed sparingly with brown and 

 gray, the long hairs black pointed. Face and ears tawny gray, the 

 latter with black tips. Pelage white to the base. 



Winter Pelage. Pure white. Specimens from more southern 

 localities are darker in summer, intergrading into L. a. bangsi. 



Measurements. Total length, 660; hind foot, 147; ear, 118. 

 Specimen from Baffin Bay. 



a.— bangsi. (Lepus), Rhoads, Am. Nat., 1896, p. 236. 



Type locality. Codry, Newfoundland. 



Geogr. Distr. Newfoundland, northern Labrador; limits not 

 determined. 



Genl. Char. Size large; as compared with the European hare, 

 the ears are shorter, skull broader, and frontals narrower. 



Color. Summer Pelage. Above grizzled gray tinged with tawny; 

 crown and cheeks grizzled buffy gray; chin, underneath head, pec- 

 toral band, lower sides, edges of rump and fore legs plumbeous gray 



