October, 1902.] MAMMALS OF KEEWATIN. 55 



covered with shoii, thick grass, through which their runways extended 

 in every direction. They burrowed extensively, sometimes beneath' 

 boulders, but as often in the sides of tiny terraces or from a flat sur- 

 face. Their holes seemed to bo connected in an endless labyrinth. 

 We captured several by suddenly overturning some of the boulders,, 

 but most were taken in traps set in their well-trodden roads. They 

 paid no attention to bait, but ^\■ere readily caught in runway traps. 

 When taken alive they showed considerable ferocity for animals of 

 their size, snarling and biting vigorously. The breeding season seemed 

 to be nearly over, but a few females contained from four to six 

 embryos. The teats are eight in number, four inguinal and four 

 pectoral. 



No specimens of Leiuiibus from the A'icinity of Point Lake, the type 

 localitjr of tfiiiitfcivnatKs, are available for comparison, but it is not. 

 likeh' that the Hudson Bay animal difl'ers appreciabl}^ A few speci- 

 mens, in poor condition, from the Anderson River region, show no 

 apparent difi'erences. 



Oolof ofddultn. — Fur everywhere plumbeous at base, on head and 

 shoulders tipped with black and grayish in about equal proportion ; 

 lower parts and sides rusty ochraceous, this color extending forward 

 on cheeks and lips and sometimes tingeing slightly the head and 

 shoulders; lower part of back bright reddish brown, the fur very 

 thick and long; tail usually distinctly bicolor, yellowish below, and 

 dusky brown above; pencil about 9 mm. in length; feet dusky brown 

 above, lighter below. In some of the half-grown specimens in fresh 

 pelage the head and shoulders are considerably flecked with the color 

 of the sides and there is an indistinct dusky stripe extending from 

 between the ears to the middle ef the back. Younger specimens are 

 nearly unicolor throughout, the plumbeous fur tipped with j^ellowish 

 brown. 



ACeaMui'i'inentta. — One of largest specimens: Total length 160; tail 

 vertebra 22; hind foot 20. Average of ten adults: 151; 21. S; 20. 

 Skull: Average of four adults: Basal length 30.6; zygomatic breadth 

 21.5; interorbital breadth 3.1; mastoid breadth 16.5. 



Remarh'i. — Arr/'eoln trim ucmnatus was recorded from Igloolik, Mel- 

 ville Peninsula, by Richardson,* and was said by J. G. Ross to be com- 

 mon on the shores of Boothia Felix.* 



Dicrostonyx richardsoni Merriam. Richardson Lemming. 



Dicroatonyx richardsoni ilerriam, Proo. Wash. Aead. 8ci., II, p. 26, March 14, 1900. 

 About 120 specimens of this interesting lemming were collected. 

 These ranged in age from young a few days old to fully adult individ- 

 uals. About 80 were taken, mainly by my brother, at Fort Churchill^ 



"Appendix to Parry's Second Voyage, p. 311, 1825 (1827). 

 ^Appendix to Ross's Second Voyage, p. xiv, 18:35. 



