SOUTH-AMERICAN MAMMALS. 225 



Muséum d'Histoire naturelle, 1832, pi. 19, figs 5 et 6" ; 

 the molar- series several times has been figured; the only 

 good figures however of these parts are to be found in 

 the »Revue et Magasin de Zoölogie, 1852, pi. 16, figs. 1 

 and l;i (Deville)." 



As to the bony parts M. Deville correctly observed that 

 the fore feet have five digits as well as the hind feet and 

 that the fifth digit of the fore feet is very small so that 

 M. Is. Geoffroy has overlooked it in describing the feet 

 after the very badly preserved type-specimen. 



Echimys hrevicauda Günther. 



A male-specimen, labeled Samiria, 19 December 1881 

 and collected by Mr. J. H. , agrees exactly with Water- 

 house's description of an £cAm?/s-specimen (Mammalia, T. 

 II, p. 498, foot-note). Dr. Günther (P. Z. S. L. 1876, p. 

 750) assures that Waterhouse's specimen is a tailless indi- 

 viduum of E. hrevicauda Günther, and I thus give to my 

 specimen the latter name. The only difference in Güuther's 

 figures of the skull and the skull of my specimen is that 

 in the latter the nasal bones are much more produced and 

 longer. The Samiria-specimen moreover is larger in all its 

 dimensions. 



Another specimen, a young (only three molars present) 

 female from the same collection is from Nauta, 12 Sep- 

 tember 1880. I think it to be a young of this species , 

 with which it agrees in form and distribution of colors 

 (f. i. hairs of underparts are pure white to the root and 

 separated by a well-marked line from the dark color of 

 the sides of the body) : there are however no harsh hairs. 



This species thus is to be found in Southern-Ecuador?, 

 Peru and Bolivia. 



Didelphy s lanigera Desmarest. 



This species is nearly as rare in collections as Dacty- 

 lomys typus Is. Geoffroy. 



Notes from. th.e Leyden ÜVEusetxm , "Vol. IX. 



