104 THE STRUCTURE OF MAN 
directly connected with the zygomaticus minor, the orbicularis 
palpebrarum, the auricularis anterior, and the transversus nuche. 
On the other hand, however, the fact that the mimetic musculature 
is innervated by the facialis (njc., Fig. 69), a nerve which, by 
location and distribution, is connected with certain muscles of the 
visceral skeleton, compels us to conclude that this (the mimetic) 
musculature has to some extent wandered from its original 
Fic. 67.—DIAGRAM OF THE DISTRIBUTION OF THE PLATYSMA OVER THE HEAD. (After. 
Gegenbaur.) The larger areas are marked with Roman figures, the smaller with 
letters (cf. with Fig. 70). 
position. It would appear to have moved up from the region of 
the lower jaw,! and to have entered into close connection with the 
soft parts surrounding the auditory and buccal apertures, 7.e. with 
the lips and with the pinna, which are themselves of secondary 
1 According to Killian, it is more than doubtful whether Ruge is right in 
assuming a post-auricular upward wandering of the platysma. Killian holds that 
the pars occipitalis of the platysma had from the beginning a dorsal position, and 
that it is nothing more than the posterior superficial layer of the dorsal portion of 
the musculature of the hyoid arch, as it appears not only in most Mammalian 
groups, but also in many species of Birds, e.g. Owls, in which even external auditory 
