Mammalia of Southern Brazil. l-i3 
and essentially, so that there appears to me to be two species, or. 
perhaps, subspecies. The most important difference is in the 
shape of the naked part of the nose. In the P. tiasua from Sao Joao, 
in each of the three specimens, this region is not longer than wide 
above, and is wider than deep below, being separated by a broad 
band of hair from the lip border. In the P. riifus this region is 
constantly at least twice as long as wide above, and much deeper 
than wide below, with an angular outline which approaches near to 
the lip border. In the P. nasua, the white on the upper lips is wide 
and conspicuous, and the cheeks and top of head are of a light gray 
or pale brown. The top of the nose is light except at the end, and 
the median head stripe when present is of a darker color than the 
top of the head. In the P. riifus the white line on the upper lip is 
very narrow or wanting, and the head is generally blackish gray, 
the color of the vertex continued on the middle line to the black of 
the top of the nose. In the P. nasua the general color is light 
brown or gray ; below light yellowish brown. Less than half the leg 
is black. In the P. rufus the back is dark rufous, the hairs generally 
shortly, sometimes deeply, black tipped : belly and throat bright 
rufus, except the white chin. More than half the legs black. 
The colors of these specimens are as constant as the different 
character of the naked nasal surfaces, and the resulting appearance 
is that of two species. The specimens of the P. nasua appear larger 
and more robust than those of the P. rufus. I cannot detect any 
difference in the skulls and teeth; there being no osseous character 
corresponding to the different proportions of the external nasal 
organs in the two species. 
I find the characters pointed out by J. A. Allen^ to distinguish 
the two Brazilian species from the Mexican, to hold good. 
50. Cercoleptes caudivolvulus Pallas. 
A skull from Chapada. 
51. UNCI A ONCA Linn. 
One skin with skeleton, and three skulls, from Chapada. 
52. Uncia coNCOLOR Linn. 
One skull from Chapada. 
' ^"lletin of the U. S. Geolos- Sun-ey of the Terrs, 1879. vol. v, p. 161. 
