Species of Reithrodon &e. from Argentina. AT5 
Dimensions of the type :— 
Head and body 155 mm.; tail 104; hind foot 32; 
ear 27. 
Skull: greatest length 37°5; condylo-incisive length 35 ; 
zygomatic breadth 21; upper molar series 7°2. 
Hab. Mar del Plata, on the south-eastern sea-coast of 
Buenos Ayres Province. - 
Type. Adult female. B.M. no, 12.12.11.1. Brought 
home alive by W. A. Smithers, Esq., and presented by the 
Zoological Society. Lived about a month at the Zoological 
Gardens. Two specimens from Mar del Plata, and another 
from ‘ Buenos Ayres” received in 1882 from Mr. A. W. 
White. 
And an exactly similar colour-modification occurs on the 
north side of the La Plata among the more naked-soled forms. 
Here the typical 2. typicus from Maldonado is the dull sea- 
coast form, and the following the inland one :— 
Reithrodon typicus currentium, subsp. n. 
General characters of R. typicus, with soles similarly naked 
to behind the posterior pads, but colours throughout more 
brightly contrasted. Back mixed buffy grey, sides and belly 
strongly washed with buffy. Area round eyes reaching back 
to ears and bases of proectote buffy, terminal part of proectote 
dark brown ; metentote buffy. A well-marked patch on sides 
of neck below ears brown, contrasted with the pale areas 
round it. Hands and feet white; tail almost white, the 
usual darker line along its top quite inconspicuous. 
Dimensions of the type :— 
Head and body 139 mm.; tail imperfect (another specimen 
108 mm.) ; hind foot 31; ear 26. 
Skull: greatest length 36°5 ; condylo-incisive length 34 ; 
zygomatic breadth 19; upper molar series 7°3. 
Hab. Corrientes. Type from Goya. 
Type. Adult male. B.M. no. 98. 12. 3. 4. Original 
number 9-1. Collected 23 July, 1895, by Mr. R. Perrens. 
Presented by Oldfield Thomas. 
The original type of Waterhouse’s 2. typicus, collected at 
Maldonado by Darwin, is now much faded, but it evidently 
never had the well-contrasted markings of the Corrientes 
foria. 
Abrocoma budini, sp. n. 
A drab-coloured Abrocoma with large feet and tail and 
shorter ears than A. cinerea. 
