Mammalia of Southern Brazil. 147 
satisfy me that the two forms cannot oe regarded as specifically 
identical. Their differences may be compared as follows : 
D. tajassu. Malar crest terminating above infraorbital foramen ; 
nasal bones rounded in cross-section ; first superior premolar (fourth 
of old works) tritubercular or rounded in outline, premolariform ; 
molars not wrinkled. 
D. angulatus sp. nov. Malar crest continued forwards to base 
of canine alveolus ; nasal bones pinched or angulate on the middle 
line ; first superior premolar quadritubercular, with intermediate 
tubercles, and quadrate in outline, molariform ; molars wrinkled. 
The characters cited are constant, although the amount of angu- 
lation of the nasal bones in the D. angulatus is subject to some vari- 
ation. Another character, generally constant, is the form of the fos- 
sa above the diastema. In D. tajassu it is a narrow groove ; in D. 
angulatus it is a wide fossa. On comparing two Texan skins with 
five from Brazil, I notice but one distinctive character. The naked 
spot on the rump is very much larger on the former, and it is follow- 
ed by a large patch of brown hairs, forming a distinct spot. In the 
D. tajassu the brown hairs exist, but in smaller numbers, and they 
are completely covered by the black hairs which are mixed with 
them. The feet have been cut off from my Texan skins, and those 
of other specimens are in skeleton, so that I cannot compare the 
hoofs. The Texan skulls average larger in dimensions than those 
from Southern Brazil. 
The characters of the first premolar, and of the dentition gener- 
ally, are well represented by Professor Baird, but the prolongation of 
the malar angle and the roof-shaped nasal bones are not very clearly 
expressed in the outline figures he has given. * His specimens came 
from the Rio Grande. Mine are, one from the Guadalupe R., two 
from the Llano R., and two from a tributary of the Red River. 
The character of the first premolar in the D. angulatus approxi- 
mates it to the D. nasutus Leidy. 
OO. LARIACUS CAMPESTRIS F. Cuv. 
One skin with skeleton ; three skins, and three skulls ; all from 
Chapada. 
^ U. S. Mexican Boundary Survey, PI. : 
