Mammals from San Juan, Western Argentina. 215 



2. Pseudalopex culpceus, Mol. 

 (J. 1243, 1244. Cafiada Honda. 



3. Grisonella ratellina, sp. n. 



S. 1269. Pedernal, 1200 m. 



Size markedly smaller than in G. huronax. Colour dark, 

 iron-grey on fore-back, the light tipping- of the hairs white, 

 and only becoming slightly buffy on the rump and tail. 

 Light facial band not strongly developed, whitish and less 

 buffy than in otiier forms. Ciiin, interramia, and sides of 

 throat with many white hairs intermixed with the black, but 

 this may be an effect o£ senility, the only specimen being 

 quite old. 



Skull much smaller than in G, huronax, and also smaller 

 than in the Ciiilian G. melina. Flattened above, the forehead 

 decidedly lower than in the allied species. Ridges not 

 greatly developed, in spite of the age of tlie type. Back of 

 skull not broad, tiie mastoid breadth comparatively little. 

 Teeth much smaller than in G. huronax. 

 Dimensions of the type : — 



Head and body 429 mm.; tail 169; hind foot 60 ; ear 22. 

 Skull: median length 77; condylo-basal length 77 5; 

 zygomatic breadth 43 ; interorbital breadth 16'8 ; inter- 

 temporal breadth 17'3; mastoid breadth 37'7 ; height of 

 crown above palate between m^ 18 ; maxillary tooth-row 

 22*5 ; length of />* 8 ; transverse diameter of m^ 6'4. 

 Hab. As above. 



Ti/pe. Old male, B.M. no. 21. 6. 19. 1. Original number 

 1269. Collected 9th January, 1921. 



This huron is readily distinguished from the Argentine 

 form, G. huronax, by its much smaller size aiid its more 

 flattened skull. In this latter respect it resembles the 

 Bolivian huron G. luteola, and may be nearly allied to it, 

 but as luteola is only known from a female, and ratellina by 

 a male, skull comparison is difficult. The colours of the two 

 are, however, widely different, luteola being very strongly 

 buffy, and alone equalled in that respect by the Brazilian 

 G.furax. 



4. Conepatus proteus, Thos. 



(?. 1264; ? . 1272, 1331. Pedernal, 1000-1200 m. 

 This IJttl© skunk was discovered in 1901 by P. O. Simons 



