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GENUS LAGOMYS.— Geoff. 
DENTAL FORMULA. 
3—2 . 0—0 5—5 
Incisive — Canine - — ; Molar — = 26 , 
1 — 1 0—0 0 — St 
Teeth and toes similar to those of the genus Lepus, upper incisors in 
pairs, two in front and two immediately behind them, the former large and 
the latter small. 
Ears moderate ; eyes, round ; hind legs not much longer than fore legs ; 
fur under the feet ; no tail ; mammae four or six ; clavicles nearly perfect. 
Native of cold and Alpine regions. They lay up stores for winter pro- 
vision which is never done by the true hares. They have a call-note resem- 
bling that of some species of Tamice. 
The name of this sub-genus, Lagomys, is derived from the Greek words 
Aoty«s, {logos), a Hare, and fwf, (mus), a Mouse. 
Four species of this genus are described ; one, the Pika, exists in the 
northern mountains of the Old World, one in Mongolian Tartary, one in 
the south eastern parts of Russia, and one in the Rocky Mountains of North 
America. 
LAGOMYS PRIN CEPS. —Richardson. 
Little-Chief Hare. 
PLATE LXXXIII . — Males. — Natural Size. 
L. Ecaudatus, fuscus, latere pallidior, subtus griseus, capite brevi ; auri- 
culis rotundatis. 
characters. 
Tailless ; colour blackish brown, beneath gray ; head short and thick ; ears 
rounded. 
