ALLEN: mammalia: MURID/E. 51 



with far better means at hand for reaching a correct conclusion, prefers the 

 association of the griseoflava group with Eligmodontia, this course is 

 reluctantly followed in the present connection, as griseoflava was one of 

 the three species originally referred by Waterhouse to his subgenus 

 Phyllotis. 



Eligmodontia typus F. Cuvier. 

 Eligmodontia typus F. Cuvier, Ann. des. Sci. Nat., ser. ii, VII, Mars 1837, 

 168, pi. V, animal, skull, dentition, and intestinal canal. "Environs 

 de Buenos Aires." — Trouessart, Cat. Mamm., ii, 1 897, 532. — Lahille, 

 Congr. Cien. Lat. Amer., Ill, 1899, 186. 

 Mils elegans Waterhouse, P. Z. S., 1837 (Nov. 21, 1837), i9. Bahia 

 Blanca; Zool. Voy. Beagle, Mamm., II, 1839, 41, pi. xii, animal, pi. 

 xxxiv, fig. 2, skull and teeth. 

 Hespeyomys elegans Burmeister, Descrip. phys. Rep. Argent., Ill, 1879, 



220, Rio Chubut, collected by Durnford. 

 Eligmodontia elegans Thomas, R Z. S., 1898, 210. Chubut, East Pata- 

 gonia. 



This species is not represented in the present material, but has been 

 recorded from Tomba Point, on the coast, about 60 miles below the 

 mouth of the Rio Chubut. The following description is transcribed from 

 Waterhouse, it being more detailed and satisfactory in form than that 

 given by F. Cuvier, which has a few months' priority of publication. 



"Fur very long and soft; general colour of the upper parts of the body 

 pale brownish yellow; the lower portion of the cheeks, and the under parts 

 of the body pure white ; the hairs of the ordinary fur of the back are gray 

 at the base, pale ochre near the apex, and brown at 'the apex ; the longer 

 hairs are brownish. On the sides of the body where the longer hairs are 

 less numerous, the pale ochre colour prevails ; the hairs on this part as on 

 the back are deep gray at the base, but at a short distance from the apex 

 they are white ; nearer the tip shaded into yellow, and at the tip brown- 

 ish : the limbs externally are of a pale yellow colour. The hairs of the 

 throat and chest are pure white to the root, those on the belly are ob- 

 scurely tinted with gray at the root. The feet are of a pale flesh-colour, 

 and furnished with white hairs; the fore feet are of moderate size; 

 the thumb nail is small and rounded, and the carpal tubercle is covered 

 with hairs ; the tarsi are long, and the white hairs extend over the whole 

 of the under parts ; the under side of the toes, however, are but sparingly 



