1876.] 



DR. A. Gl'NTHEll ON NEW MAMMALS. 



747 



Skin of an adult male from Medellin, collected by Mr. T. K. 

 Salmon. 



ECHIMYS DIMIDIATUS. 



Fur composed of hairs only, somewhat harsh to the touch, and of 

 moderate length. Tail nearly naked, covered with very small scales, 

 pencilled at its extremity. Upper and lateral parts uniform brown, 



Fijr. 7. 



Skull of Echimys dimidiatus. 

 d, upper molars; e, lower molars : twice naf. size. 



lower parts of a pure white ; the two colours sharply defined. The 

 white colour extends in a narrow stripe round the upper lip, and 

 occupies also the lower half of the tail. Feet brownish grey, toes 



