No. 424.] DIVISION OF THE MALAR BONE. 289 
No malar incisures were found in the Australians and Poly- 
nesians. Among the various American tribes, the largest pro- 
portions of the incisures were found among the Peruvians and 
the Southern Utah Cliff Dwellers, but in general the data on 
the Americans, or at least those on the better represented 
tribes, show a considerable agreement. 
In mammals below man malar incisures appear to be very 
rare. However, I found some instances of the condition in 
monkeys and a bear. The cases in monkeys, besides those 
mentioned, are as follows : 
Cynocephalus porcarius (No. 10,277, A. M. N. H.). — The left 
malar shows dorsally a marked anterior incisure, beginning 
in the maxillary border of the bone a short distance above 
the antero-inferior angle and directed obliquely upward and 
backward. 
The skull of a young Cynocephalus (No. 135, C. P. and S.) 
shows on each side an anterior malar incisure somewhat similar 
in location and direction, but smaller, particularly on the right, 
to that in the preceding case. 
In a Cercocebus mona (No. 5025, A. M. N. H.) a 0.5 cm. 
long, horizontal incisure divides slightly above its middle the 
temporal process of the left malar. 
The subject of partial malar divisions could be finished here 
were it not for two other forms of incisure which are met with 
on the bone. 
The first of these incisures, already mentioned, is the one 
which occurs at the base of the frontal process of the malar in 
some animals. It is common in younger American bears ; it is 
also occasionally found in seals and other pinnipeds, but is 
rarely seen in other classes of mammals. This division is a 
remnant of a complete separation of the frontal process of the 
malar; no analogous incisure has been found thus far in man, 
apes, or monkeys. 
The second special form of partial malar division seems to 
occur only in man. It consists of a more or less marked, ver- 
tical, or more often somewhat oblique, frequently bilateral 
incisure, which runs downward from some part of the malo- 
frontal suture. So far as I can find, this incisure has not yet 
