72 ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 



This species is of a darker colour than the last, its ears are much larger and 

 the tarsi are shorter. It has the same rabbit-like appearance. The molar teeth 

 of the lower jaw are figured in Plate 33, fig. 4, a. 



" This mouse, when alive, from its very large eyes and ears, had a singular 

 appearance, somewhat resembling that of a little rabbit. It frequents small 

 thickets in the open grassy savannahs near Maldonado, and was caught with 

 facility by means of traps baited with cheese. ' — D. 



3. Reithrodon chinchilloides. 



Plate XXVII. 



R. vellere longissimo et mollissimo; cor pore supra et ad later a cinereo,Jlavescenti-fusco 

 lavato, subtiis fiavescenti-albo ; caudd corpore breviore, supra fused, subtus alba : 

 auribus parvulis : tar sis mediocribus. 



Description.— Ears small; tail shorter than the body; tarsus moderate; fur 



long and extremely soft. General hue of the upper parts of the head and 



body ashy-brown ; the lower part of the cheeks and sides of the body are 



of a delicate yellow colour ; the under parts of the head and body and the 



rump are cream colour. The ears are blackish ; * the tail is tolerably well 



clothed with longish hairs, which are, however, not so thickly set as to hide 



the scales— on the upper side they are blackish brown; on the sides and 



beneath they are white. The feet are white. All the fur is of a deep gray 



colour at the base ; the hairs of the back are of a very pale yellow colour 



(almost white) near the tip, and brown at the tip ; the longer hairs are black 



at the apex. The incisors are yellow ; the hairs of the moustaches are 



numerous and very long — some of them are whitish, and others are black at 



the root, and gray at the apex. ....... 



Length from nose to root of tail 



of tail 

 from nose to ear 



In. Lines 



o 



2 







2 



Length of tarsus (claws included) 



of ear 



In. 



Lines 



1 











5i 



Habitat, South shore of the Strait of Magellan, near the Eastern entrance. 



This little animal was preserved in spirit, and has since been mounted, it is 



* They are naked, but I suspect the hair has been rubbed off. 



