SYNOPSIS OP THE 



Icon. 



' Inhabits Buenos Ayres. 



The three following are referred by their describers to 

 this division of the Glires, but their dentition is not ascer- 

 tained. 



602. 29. M. Leucopus (White-footed Mouse.) Brownish- 

 yellow above, white underneath, head yellow ; ears large ; 

 tail as long as the body, pale brown above, gray under- 

 neath ; the paws white ; about five inches long. 



Raffinesque^ Journey to the Westward of the United States, 

 and American Monthly Mag. t. 3, 444. 



603. 30. M. Nigricans (Wood Rat of Raffinesque.) Black 

 above ; gray on the belly ; tail black ; longer than the 

 body ; about eight inches long. 



Mus Nigricans, Black, or Wood Rat, Raffinesque, Jour- 

 ney to the Westward of the United States, and American 

 Monthly Mag. Oct. 1818. 



*^* Spiny Rats. 



604. 31. Af. Perchal (Perchal Rat.) Reddish-brown 

 above, with spiny hairs intermixed ; grayish underneath ; 

 tail not so long as the body; about seventeen or eighteen 

 inches long. 



Mus Perchal, Gmel. Echimys Perchal, Geoff. 

 Rat Perchal, Buff. Hist. Nat. Supp. t. i. 276. 

 Icon. Bufl^. I. c. pi. 69. 

 Inhabits the town and vicinity of Pondicherry. 



605. 32. M. ? Cahirinus. (Egyptian Rat.) Ashy gray, 

 deeper on the upper than on the under parts, composed of 

 rough spiny hairs ; tail as long as the body ; about four 

 inches long. 



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