248 Mr. O. Thomas on 
of their fur, the more or less complete effacement of their 
lateral bands, and the blackish colour of the rings on the 
limbs. [Elliot merely speaks of there being two styles of 
coloration, without connecting the difference with geography. 
But a comparison of the specimens in the Museum, and of 
the descriptions given by various authors, shows at once that 
it is the Argentine (and perhaps Chilian) form only that 
corresponds to Azara’s description*, on which the name 
pajeros is based, and that the southern, Patagonian, ones are 
sufficiently distinct to require a special name. 
Taking as type the fine Santa Cruz specimen ¢ obtained 
by Darwin during the voyage of the ‘ Beagle,’ described and 
figured by Waterhouse }, I propose to apply the above term 
to it. Additional detailed description is not necessary, but I 
may enlarge the notes above quoted from d’Orbigny and 
Gervais by saying that the back of the ear is grey basally 
and black terminally, instead of fulvous narrowly edged with 
black, the back is more thickly haired and less markedly 
crested, the tail appears to be shorter and more thickly furred, 
and the fulvous (“ cannelle ””) marking on the chest is more 
or less replaced by black and white. Elliot’s two figures, 
though over-coloured, show the two subspecies very well. 
In the skull the only difference seems to be that in crucina 
the posterior palatal opening is markedly wider than in 
pajeros, and even this may not prove to be constant. 
Dr. Matschie § has made some observations on Argentine 
and Chilian specimens of this group, but does not refer to 
the extreme southern form. 
Nasua quichua, sp. n. 
Most closely allied to N. montana, Tschudi, but rather 
smaller and very different in colour. 
Colour, broadly speaking, grey anteriorly and bright rusty 
posteriorly. Face grizzled grey, with blackish markings on 
sides of muzzle, reaching back to eyes; white markings 
above and below posterior half of eyes. Crown and nape 
olivaceous yellow, with scarcely a trace of central dark streak; 
region between ears clearer grey. Lars thickly clothed out- 
side and in with greyish-white hairs, those of the back 
dark basally. Anterior half of body coarsely grizzled grey, 
the long hairs yellowish white for three fourths their length, 
* Ess. Quadr. Paraguay, i. p. 179 (1801). 
+ B.M. no. 55. 12. 24. 261. 
t Zool. Voy. ‘ Beagle,’ Mamm. p. 18, pl. ix. (1838). 
§ SB. Ges, Freund. Berl. 1894, p. 60. 
