Mammals from Bolivia. 127 



about to the commencement of the lumbar region ; neither so 

 broad nor so long as in C. arequipce, much more developed 

 than in C. I'nca ; median black hair on nape and tore back 

 averaging 1-1^ inch in breadth. Tail very thick and bushy, 

 wholly black proximally, profusely mixed termitially with 

 white hairs, the latter attaining to 130 millim. in length, tlie 

 black ones about 90 millim. 



Skull slightly shorter than in C. arequipce ; bony palate 

 continued further behind molars than usual. Upper molar 

 small ; lower cariiassial short and squat. 



Dimensions of four specimens (measured in the flesh) : — 



d. 2- 2- 2- 



mm. nun. mm. mm. 



Head and body 420 410 390 34o 



TaU 235 235 200 210 



Hind foot, 8. u.* 65 68 04 60 



Ear 29 27 26 26 



Skull (of type) : length from convexity above foramen 

 magnum to gnathion 78 ; basilar length GQ ; greatest breadth 

 49; interorbital breadth 23*5; intertemporal breadth 20; 

 mastoid breadth 4U*5 ; palate length from gnathion 34-5 ; 

 upper molar lOf X 7-8. 



The first measurement in the other skulh is: (J) 77, 

 ( ? ) 72-7, 72-4, and 70. 



In an old male C. arequipoi it is 83, and in the type (im- 

 mature) it is 78. 



Hab. as above. 



Type. Adult ^. Original number 1495. Collected 10th 

 July, 1901. 



" Native names ' Zorrino ' and ' Anutuya.' " — P. 0. S. 



The four specimens of this skunk are perfectly alike inter 

 se, and all differ from C. arequi2)fe by their rather smaller 

 size, longer tails, and the less extension of the dorsal white 

 backwards. C. inca, on the other hand, has much less white 

 again than C. chorensis. 



The proper treatment of these skunks is a matter of great 

 diflSculty, for while each local set are very constant and have 

 a distinct facies of their own, there can be no doubt that 

 further material will show some of them to intergrade, widely 

 as the extremes differ from each other. Describing them as 



* The cum ungue measurement is 8-9 millim. greater. 



t The first of these two measurements is the gi-eatest diameter taken iu 

 an oblique line from the autero-exterual to the postero-internal corner, 

 the second a line at right angles to the iiist from the antero-interual 

 convexity to the little concavity on the posterior border. 



10* 



