440 Mr. 0. Thomas on a 



propose to name it \n honour of its donor, to whom tlie 

 J\Iuseum is indebted for series of all the mammals of Central 

 Chili. 



Viscaccia Wolffsohni, sp. n. 



A large species with long fur strongly suffused with orange ; 

 tail very bushy. 



Size large, form stout and robust, the size appearing even 

 larger than the truth owing to the very long rich fur, of which 

 the wool-hairs are over 35 mm. in length and the long hairs 

 upwards of 50 mm. General colour above of head and body 

 approaching clay-colour (E-idgway), though brighter and 

 clearer; the wool- hair?-, which give the predominating colour, 

 brownish slaty for four- fifths their length, their ends creamy 

 buff darkening to clay-colour. Below, on the lower cheeks, 

 throat, chest, and belly, the terminal colour becomes richer 

 and redder, attaining almost to " tawny." A distinct white 

 spot on each axilla and on each side of the inguinal region. 

 Dorsal dark line little marked. Head like back. Ears 

 comparatively short, thickly and closely haired, their backs 

 black, their inner surfaces with whitish hairs, and there is a 

 marked line of creamy-tipped hairs running across their bases 

 above. Arras with tawny-tipped hairs, the tawny or yellowish 

 cclour extending to the tips ot the toes. Hind limbs duller, 

 more brownish clay-colour; the feet very large and heavy. 

 Tail far finer than in any other form, immensely bushy, the 

 hairs of its dorsal crest attaining over 150 mm. ; in colour 

 the upper, crested side is mixed black and buff or ochraceous 

 buff ; underside black, finely grizzled with glossy ochraceous 

 buff. 



Skull comparatively large and heavy ; nasals expanded in 

 front; palatal foramina rather short; bullifi not so much 

 swollen as usual. 



Dimensions of the type (measured in the flesh) : — 



Head and body 470 mm. ; tail 305 ; hind foot 107 ; ear 65. 



Skull: greatest length 91 ; basilar length 75'5 ; zygomatic 

 breadth 50 ; breadth of brain-case on parietal bones 34'2 ; 

 length of u[iper tooth series (crowns) 22. 



Hah. Sierra de los Btiguales y de las Vizcachas, lat. 

 50° 50' S., long. 72° 20' W., on the boundary between Chili 

 and Argentina, 



Type. Adult female. B.M.no. 7. 4. 5. 6. Original number 

 277. Collected 1st February, 1907, by Mr. John A. Wolffiohn. 

 Three specimens. 



In the interesting account which Mr. Wolffsohn has 

 sent me of the capture of these specimens, he states that 



