'■^ Mammalia of Southern Brazil. 
. CoASSUs RUFUS F. Cuv. 
One skin with skeleton : one skin with skull ; two skulls ^ 
in of head, and six separate skulls, all from Chapada. 
. CoASSUS siMPLicicoRNis Illiger. 
One skin with skeleton ; one skin with skull ; three skins 
ree skulls, all from Chapada. 
QUADRUMANA. 
63. Mycetes seniculus Lir 
Very abundant at Sao Jo 
from bright rusty red, to bro' 
specimens from Chapada. 
64. Mycetes belzebul Linn. 
Three specimens from Chapada Matto Grosso. The skull of this 
species does not differ from that of the last. The hair differs, 
especially on the head. It is procumbent and radiates in all direct- 
ions from a point on the middle line posterior to the ears. It points 
directly forwards on the crown and front to the base of the nose, 
and anterior eyebrows, when it is met by hair directed upwards 
and backwards, forming a low tranverse elevation bordering the front, 
much as described by Slack in the M. niger. In the M. seniculus, the 
hair of the crown is erect and woolly from front to rear. 
65. Cebus cirrhifer. G. St. Hilaire. 
One adult (female) from Sao Joao. 
66. Cebus elegans G. St. Hilaire. 
Abundant at Chapada. In the males there is generally a low 
sagittal crest, the glabella is swollen, and the frontal profile is 
convex. In the females there is no sagittal crest, the glabella is less 
swollen and the front is less convex. In the specimen above referred 
to, the C. cirrhifer, the characters of the skull are like those of the 
female C. elegans, but the front is flatter in profile. 
SYNOPSIS. 
