SPECIES OF MAMMALIA. 



598. 25. M. Cephalotes (Great-headed Rat.) Head very 

 large, muzzle short ; brown above, lighter on the sides, 

 whitish underneath ; tail as long as the body. 



Mus Cephalotes, Desmarest, Nouv. Diet. d'Hist. Nat. 

 305. 



Great-headed Rat, or second Rat of d'Azara. Quad, of 

 Paraguay. 



Icon. 



Inhabits Paraguay. 



599. 26. M. Auritus (Long-eared Rat.) Head thick ; 

 ears long ; mouse-colour, lighter underneath ; tail shorter 

 than the body ; about five inches long. 



Mus Auritus, Desmarest, Nouv. Diet. d'Hist. Nat. 305. 

 Long-eared, or fourth Rat oid'Azara, Quad, of Paraguay. 



Icon. 



Inhabits South of Buenos Ayres. 



600. 27. M. Nigripes (Black-footed Rat.) Head thick ; 

 ears short and round ; yellow^-brown above, whitish under- 

 neath ; paws deep black ; tail shorter than the body ; about 

 four inches long. 



Mus Nigripes, Desmarest, Nouv. Diet. d'Hist. Nat. 305. 

 Black- footed Rat, or sixth Rat of d'Azara, Quad, of Pa' 

 raguay. 



Icon. 



Inhabits Paraguay. 



601. 28. M. Laucha (Laucha Rat.) Head moderate; 

 muzzle pointed ; lead colour above, whitish underneath; 

 tail rather shorter than the body ; about three inches 

 long. 



Mus Laucha, Desmarest, Nouv. Diet. d'^Hist. Nat. 305. 

 Laucha Rut, or seventh Rat of d'Azara, Quad, of Para- 

 guay. 



231 2R2 



