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GEORYCHUS GRCE N L AN DIC U S. — Ric h. 
Greenland Lemming. 
A. Exauriculatus, rostro acuto, palmis tetradactylis hirsutis ; unguibus 
apice cylindrico producto, linea dorsali nigra. 
CHARACTERS. 
Earless ; with a sharp nose ; fore-feet hairy beneath , with four toes , armed 
with daws , having sharp cylindrical points ; a dark stripe along the middle 
of the back. 
SYNONYMES. 
Arvicola (Georychus) Grcenlandicus, Greenland Lemming.— Bich, Fauna Bo- 
reali Americana, p. 134. 
Mouse, Sp. 15. — Foster, Phila. Trans, lxii., p. 379 ? 
Hare-tailed Bat? — Pennant, Arct. Zool., vol. i., p. 133 ? 
Mus Grcenlandicus. — Bichardson, Parry’s Second Voy., App. p. 304. 
Owinyak — Esquimaux. 
DESCRIPTION. 
Size rather less than a rat : head rounded, narrower than the body, 
tapering slightly from the auditory opening to the eyes ; nose acute. There 
aie no external ears, but the site of the auditory opening is denoted by 
an obscure transverse brownish streak in the fur. The eyes are near each 
other and small. The fur on the cheeks is a little puffed up. The upper 
lip is deeply divided ; lower incisors twice the length of the upper ones ; 
whiskers long ; body thickly covered with long and soft fur. Tail very 
short ; the fore extremities project very little beyond the fur ; the palms 
incline slightly inwards, are small, and the toes very short ; both are 
covered thickly above and below, with strong hairs curving downwards, 
and extending beyond the claws. The only naked parts on the foot are a 
minute, flat, unarmed callus, in place of a thumb, and a rounded smooth 
callus at the extremity of each toe. These callosities do not project for- 
