68 PATAGONIAN EXPEDITIONS: ZOOLOGY. 



'' Descyiptiou. — Ears small; tail shorter than the body; tarsus moder- 

 ate ; fur long and extremely soft. General hue of the upper parts of the 

 head and body ashy brown ; 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 toler- 

 ably 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. 



Inches. Lines. [mm.] 



" Length from nose to root of tail 5 o 127 



" of tail 2 4 59 



" from nose to ear i 2 25.8 



" of tarsus (claws included) i o 25.4 



" of ear o 5^ 12.6 



"Habitat, South shore of the Strait of Magellan, near the Eastern 

 entrance." — Waterhouse, /. c. 



Milne-Edwards (/. c.) states that it was obtained at Orange Bay, where, 

 however, only two examples were secured during a long sojourn there by 

 the French Mission. Little therefore appears to be known regarding its 

 distribution or habits. 



EUNEOMYS PETERSONI Allen. 

 (Plates XIII, Fig. 4, Skull ; XIV, Figs. 6 and 7, Teeth.) 



Ezmeoiuy s petersoni AWtn, Bull. Am. Mus. Nat. Hist, XIX, 192, May 9, 

 1903. Near Cordilleras, upper Rio Chico de Santa Cruz, Patagonia. 



Similar in coloration to Phyllotis xanthopygus, but very much smaller, 

 with a relatively very short tail and naked soles, but the upper incisors as 

 strongly grooved as in Reithrodon cuniculoides. 



Adult (type), February. — Pelage very long and soft, almost woolly. 

 Above dark gray -brown, varied with blackish and fulvous, the pelage being 

 plumbeous black for the basal four fifths with an apical band of brownish 

 fulvous, and many longer black hairs intermixed ; sides much paler and more 



