142 Mammalia of Southern Brazil. 
Postdental part of palate as wide as long ; malar bone very 
robust ; front wide, flat, exceeding diameter of orbit ; 
each nasal bone truncate with produced outer angle. 
P. hernandezii. 
Postdental part of palate longer than wide ; malar bone 
robust ; front narrow, convex, width equal that of orbit; 
each nasal bone deeply emarginate distally P. lotor. 
II. Canines much compressed ; metaconid of P. m. I. 
always wanting. 
Muzzle shorter ; palate angularly elevated posteriorly ; 
last inferior molar wider, heel median ; larger. . .P. nasicus. 
Muzzle longer ; palate nearly flat posteriorly ; last inferior 
molar narrower, the heel internal ; smaller P. nasua. 
In the two specimens of Procyon cancrivorus before me the 
metaconid of the p. m. i. is well developed. In the P. lotor it is 
distinct in four out of eight skulls, and is represented by a mere trace 
in the other four. In a single P. hernandezii a trace only is 
visible. The form of the free extremity of the nasal bone is not 
constant in these species, and that of the last inferior molar will bear 
further examination. 
The question is raised by Dr. P. L. Sclater, as above cited, as to 
whether the southern black-footed raccoon is specifically identical 
or distinct from the rufous-footed form from Surinam and Central 
America. In the lack of specimens of the latter region I cannot 
give a definite answer to this question. 
In the skull of the P. hernandezii, above described, the processus 
pyramidalis of the palate has on its external face, a deep groove, 
bordered above and below by an alate crest, which are wantmgin 
the P. lotor. The malar bone is also produced downwards at its 
inferior border next the maxillary, and the postorbital processes of 
the frontal and malar bones are both more distinct than in the P. 
lotor. Whether these are individual characters or not I cannot now 
determine. 
48. Procyon nasua Linn. Nasua rufa Desm. Allen. 
Three skins, with skeletons, all from Sao Joao. 
49. Procyon rufus Desmarest. 
Twenty skins, three with skeletons, and one with a skull ; seven- 
teen separate skulls and eleven skeletons, all from Chapada. 
The skins of the Coatis from the two localities, differ constantly 
