1()2 Mr. O. Thomas on 



Skull cLiefly remarkable for its small size as compared 

 with that of any other species. 



Dimensions of the type (measured on skin) : — 



Head and body 365 mm. ; tail 390 ; hind foot 84. 



Skull : g-reatest length 58*5 ; basal length 44*5 ; zygo- 

 matic breadth 39 ; mastoid breadth 34*3 ; front of canine to 

 back of m^ 18'2. 



IJah. Chaco of Paraguay ; type from 30 miles N. of 

 Concepcion. 



T^/pe. Male. B.M. no. 94. 3. 6. 1. Collected October 

 1893 by Dr. J, Bohls. Two specimens. 



In the absence of fresh specimens of C. donacophilus these 

 skins from Paraguay were provisionally referred to that 

 species. Now, however, a series of skins from Bolivia, 

 collected by Mr. Steinbach, and nearly topotypical of 

 d'Orbigny's species, prove conclusively that the pi-esent form 

 needs description. Its differential characters are given above. 



Gri'son'^ fara.Vj sp. n. 



One of the smaller species of the group, of a strongly 

 yellowish colour. 



General colour comparatively yellow or buff7, tlie facial 

 streaks and the ends of tlie dorsal hairs bufFy or buffy ochra- 

 ceous, the lateral streak behind the ear more deeply ochra- 

 ceous. Underfur of back brown, darkening terminally. 

 Under surface and limbs wholly black, the belly without any 

 light tipping. Tail-hairs brown basally, broadly tipped with 

 buflfy ochraceous ; parted on the upper surface in such a way 

 as to show a narrow, median, ochraceous-buffy line along the 

 centre, composed entirely of short woolly hairs. 



Skull with the carnassials and molars of medium propor- 

 tions, the lower carnassial without a supplementary internal 

 cusp. 



Dimensions of the type (not fully adult) : — 



Head and body 317 mm.; tail 110; hind foot 54; ear 22. 



Skull : basal le'ngth 60 ; greatest breadth 37 ; length of 

 p"* on outer edge 7'5 ; greatest diameter of m^ 6*3. 



Ilab. Southern Brazil. Type from San Francisco dos 

 Campos, S. Minas Ceraes. Altitude 1580 m. 



T^pe. Immature male. B.M. no. 1. 6. 6. 25. Original 

 number 622. Collected 29th March, 190L by Alphonse 

 Robert. 



This is the common Grison or " Fuvao " of Southern 

 Brazil, generally known by the name of " GaUctis vittata " ; 

 * Oken, 1816. Better known as GaUctis. 



