492 Mr. O. Thomas on small Mammals 
Molars conspicuously smaller than in C. budini, their 
antero-posterior diameter less than the outer length of p*. 
Dimensions of the type :— 
Head 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 m' 26 ; breadth of 
mesopteryoid fossa 6°5 ; maxillary tooth-row 21:5; outer 
length of pt 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 361.  Cellected 
28th September, 1918. 
As with C. budin?, 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 CO. budind is distinctly less aged than the narrow 
one of C. calurus. 
3. Oryzomys sp. 
6. 320, 348, 375, 383; 2. 329, 331, 376. 
4. Andinomys edax, Thos. 
dé. 342. 
*€ Chozchorito.” © Rare.’—LL. B. 
The striking external resemblance that Andinomys bears 
to Phyllotis is shown by the fact that Sr. Budin, usually so 
quick to detect the finest specific distinctions, united with 
no. 342 several examples of the larger Phy/lotis 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 tucumanus, Thos. 
Phyllotis darwint tucumanus, Thos. Ann. & Mag. Nat. Hist. (8) x. 
p. 408 (1912). 
go. 348, 344, 349, 852, 354, 364,370; 9. 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. 
