280 THE AMERICAN NATURALIST. [Vor. XXXVI. 
The division affects the left malar. It begins anteriorly 
slightly above the lower third of the maxillary border of the 
bone and runs, with some serration, backward, very nearly par- 
allel with the inferior border of the malar, to the 
zygomatic suture near its superior termination. 
Ventrally the division is covered by a broad 
temporo-maxillary arc. 
The right malar is normal. It is both lower 
"eT and narrower than the left bone, and even the 
zygomatic arch is lower on the right. 
MEASURES. 
LEFT. RIGHT. 
Height along the maxillary border, 2.0 cm. 1.85 cm. 
Width at middle (width minimum), 0.6 cm. 0.55 cm. 
Height of temporal process vertically, 
from the superior end of the zygo- 
matic suture, 0.8 cm. 0.65 cm. 
In a skull of Mycetes, in the same collection, there is in 
each temporal border of the malar, slightly anterior to the 
zygomatic suture, a short incisure, directed forward. 
Besides those already mentioned I have examined, for malar 
divisions, the skulls of 6 Lemurs, 5 Nictipitheci, 31 Cebi, 
IO Ateles, 1 Szlenus vetur, 16 Cercocebi, 1 Senmopithecus, 
54 Macaques, 4 Mormons, 1 Innuus, 2 Cynopitheci, and 16 Cyno- 
cephali, —all in the collection in the American Museum of 
Natural History. Among these specimens there is none with | 
complete and only a few with incomplete malar divisions. Of 
these latter only the following one deserves to 
be mentioned in this place. 
Cynocephalus olivaceus (No. 10,747 ; Fig. 8). 
— The left malar shows a faint and only 
dorsally visible, incomplete, serrated suture, 
running from a. point a very little above the 
lower third of the maxillary border of the oe 
bone to the malar foramen. The length of the suture is 1.1 cm. 
The right malar shows traces of a similar division. The two 
malars are almost exactly equal. 
