16 



GENUS ARCTOMYS, Gmel, Cuv. 



DENTAL I'OBMULA. 



Incisive ^ ; Canine -^ ; Molar — — = 22. 



Incisors strong, narrow, and wedge-shaped, anterior surface rounded ; 

 molars, with the upper surface thick and heavy. 



Head large, mouth small, and placed below ; eyes large, ears short, 

 paws strong ; fore-feet with four toes and the rudiment of a thumb ; hind- 

 feet with five toes ; nails strong, compressed ; tail buthy ; no cheek 

 pouches. 



The name Arctomys, is derived from two Greek words «fxT«? (arJttos,) 

 a bear, and n-vf, (ir.us,) a mouse. 



There are, as far as we are informed, but eight known species of the 

 genus as it is now defined, five on the Eastern Continent and three in 

 North America. 



ARCTOMYS MONAX.— Lmx. 



Wood-Chuck. Marvland Maehot. Geound-Hog. 



PLATE II. — Female and Young. Nataral size. 



A. Supra fusco cinereus, subtus sub-rufus, capite, cauda, pedibusque 

 fuscis, naso et buccis cinereis. 



chaeactees. 



Brownish-gray above ; head, tail, and feet, dark-brown ; nose and cheeks 

 ashy-broiim, under surface reddish. 



SYN0NYME3. 



Mrs MoNAX, Linn., 12 ed., p. 81. 

 Maryland Marmot, Penn, Arct. Zool., vol. I., p. 111. 

 MoNAX, ou Marmotte de Canada, Buff., Supp. 111. 

 Marfland Marmot, Godman, Nat. Hist. vol. ii., p. 100, figure. 

 Maryland Marmot, Griffiths' Cuvier, vol. iii., p. 130, figure. 



