PE 
FACIAL MUSCULATURE OF THE JAPANESE 647 
Figure 4 
Fig. 4. Female Japanese XII, thirty-two years old. Platysma well de- 
veloped; pars ascendens arcuate forward and extends to the zygomatic. The 
zygomaticus is easily distinguished from the caput zygomaticus of the quadratus 
labil superioris. The insertion of the zygomatic is separated by the caninus 
into a superficial and a deeper layer. The risorius consists of only two arcuate 
muscle bands and hes over the insertion of the triangularis. The three heads 
of the quadratus labil superioris are comparatively easily distinguished; the 
caput zygomaticus at its origin radiates toward the temple. The diverging 
marginal bundles of the orbicularis oculi, like the upper lateral part, are es- 
pecially large in the lower medial portion; the latter pass over the infra-orbital 
head of the quadratus labii super. to the caput zygomaticus. The pars trans- 
versus of the M. nasalis is present. The occipitalis is weakly developed and 
short-fibered. The M. auricularis posterior has two bellies. The long cervical 
portion of the platysma passes forward in a light curve over the insertion of the 
sternocleidomastoid under the ear. 
