282 THE AMERICAN NATURALIST. [VoL. XXXVI. 
skulls the separation of the process is complete, in two bilater- 
ally and in one on one side. The following figure shows one 
of these instances ; in this case there is not only a complete 
separation of the frontal process, but also a. superior incisure, 
running in a similar direction to the anomalous suture in the 
young bear (No. 4282; Fig. 10). 
Separations of the frontal process, such as the one just 
pictured, have been observed in the seal and walrus (Meckel, 
Pander, d’Alton, Hallman, Kostlin, cit. Gruber; the condition 
is present in a number of young seals in the collection in the 
American Museum of Natural History) ; 
they remind one of the superior division 
of the malar in Riccardi’s case and the 
one similarly situated in the first case 
reported in this paper. 
The division of the body of the malar bone is, as shown in 
the bear (No, 4282), independent of the separation of the frontal 
process. This latter appears in the bears as an P CPD si of a 
comparatively late formation. 
It is interesting to note that the nice termination of the 
malar suture, situated somewhat higher in the orangs, is placed 
still higher, relatively, in most of the specimens in lower 
monkeys and other mammals. This condition is very marked 
in the Cercopithecus and especially in the young bear. The 
cause of this lies, it seems to me, not so much in a different 
situation of the centers from which the malar develops, as in 
the different tilting of the bone, and in the differences in the 
temporal process, in man and the mentioned animals. The 
human malar bone is less tilted than that in bears, and its tem- 
poral process is considerably shorter and relatively broader than 
that of apes, monkeys, and bears, as well as other mammals. 
FIG. 10. 
PARTIAL MALAR DIVISION. 
The ; anterior and particularly the posterior portion of the 
malar shows occasionally a partial division. These. divisions 
occur mostly in the form of lineal incisures, but occasionally 
also as serrated sutures. They differ much in b si in some. 
