492 Mr. 0. Thomas on small Mammals 



Molars conspicuously smaller than in G. hudini, their 

 autero-posteiior diameter less than the outer length o^ p^. 



Dimensions of the tj'pe : — 

 ' TIcail and body 320 mm.; tail 190; hind foot 57; 

 ear 25. 



Skull : greatest (diagonal) length 69*5 ; condylo-basal 

 length 66'5; zygomatic breadth 43 ; interorbital breadth 21*2 ; 

 intertemporal breadth 15'6 ; mastoid breadth 36 ; palatal 

 length 28 ; breadth across outer corners of iii'^ 26 ; breadth of 

 niesopteryoid fossa 6'5 ; maxillary tooth-row 21*5; outer 

 length of ;>^ 6'7 ; m^, antero-posterior diameter 6, transverse 

 diameter 8. 



Type. Old male^ with worn teeth and well-developed crests. 

 B.M.' no. 19. 2. 7. 3. Original number 3()1. Collected 

 28tli September, 1918. 



As with C. hudini, the white tail and small size distinguish 

 this skunk from all earlier-described species. From that 

 animal it is separable by the less bulky skull and much 

 smaller molars, in addition to the different pattern of the dorsal 

 markings. In comparing the skull-measurements of the two 

 note must be taken of the fact that the broad skull of the 

 type of G. hudini is distinctly less aged than the narrow 

 one of C. calurus. 



3. Oryzomys sp. 



$. 320, 348, 375, 383 ; ? . 329, 331, 376. 



4. Andinomys edax, Thos. 



c?.342. 



" ' Chozcliorito.' Rare.''— iS". B. 



The striking external resemblance that Andinomys bears 

 to Phyllotis is shown by tiie fact that Sr. Budin, usually so 

 quick to detect the finest specific distinctions, united with 

 no. 312 several examples of the larger PliyUotis of the same 

 region. 



This forms a considerable extension of the known range of 

 ■ the species, which was first described from Potosi, and was 

 again found by Sr. Budin in Central Jujuy. 



5. Phyllotis tucumanuSj Tiios. 



Phyllotis danoini tuciunanus^ Thos. Ann. & Mag. Nat. Hist. (8) x. 

 p. 408 (1912). 



cJ . 313, 344, 349, 352, 354, 364, 370 ; ? . 337, 365, 367, 

 371. 



In view of the complication caused by the many local forms 

 of this genus, it seems best to use a trinomial term for this 

 animal. 



