1903.] Allen, Mammals from Northeast Siberia. 179 



34. Erinaceus orientalis, sp. nov. 

 SIBERIAN HEDGEHOG. 



Type, No. 18355, 2 ad., Vladivostok, Siberia, July 18, 1900; N. G. 

 Buxton, Jesup North Pacific Expedition. 



Similar in external characters to Erinaceus europ&us, but paler and 

 rather larger, with quite different cranial characters. General color of 

 the spiny dorsal area pale yellowish, the spines similar in character to 

 those of E. europ&us, the individual spines whitish basally with a 

 broad median band of pale brown and a whitish tip. Head, shoulders, 

 and sides pale grayish sandy brown; ventral surface very pale yellow- 

 ish, thinly haired; head pale brown with a tinge of yellow, and an in- 

 distinct whitish spot in front of the eye, enclosed in a slightly dusky area 

 which extends to and covers the sides and front of the nose and most 

 of the head anterior to the eyes; feet dull pale brown, passing into a 

 grayish yellow brown on the limbs; ears small, dusky, about as in E. 

 europceus; tail short, dull brown, very thinly haired. Mammae 6, well 

 developed. 



Measurements. Total length, 312 mm.; tail, 42; hind foot, 50; 

 ear (in dry skin) from notch, 27. Skull, total length, 61; zygomatic 

 breadth, 39; postpalatal length, 26.5; length of nasals, 19; length of 

 entire upper toothrow, 30. 



This species is based on a single old female (teeth quite 

 worn) bought alive by Mr. Buxton at Vladivostok of a China- 

 man, who told him it was caught in Vladivostok. It differs 

 from E. europ&us in its much lighter coloration, and some- 

 what larger size, but especially in various features of the skull 

 and teeth. The skull, in comparison with a nearly equally 

 adult skull of Erinaceus from Kingsbridge, Devonshire, Eng- 

 land, is of nearly the same length as the latter, but much 

 broader and more massive, with the zygomatic arches much 

 more convex outwardly, the two skulls measuring, respec- 

 tively, 59 and 61 mm. in total length and 34 and 39 mm. in 

 greatest zygomatic breadth. The rostral portion of the skull 

 in E. orientalis is much broader, less sloping and less pointed 

 than in E. europ&us, and the premaxillae are much broader 

 and heavier, but much less extended and more abruptly 

 truncated posteriorly, their line of junction with the nasals 

 being nearly 3 mm. shorter than in skulls of E. europ&us of 

 less size, making the relative difference very great. The chief 



