152 



ANTHROPOID APES, 



of America ; i.e. the zygomatic muscles, the levator 

 labii superioris, and the levator labii superioris 

 alaeque nasi. This has also been done by Duver- 

 noy, Alix, and Gratiolet, in the case of anthropoids 

 dissected by them, as well as by Macalister and 

 Bischoff. 



Bischoff was only able to identify a wide zygo- 

 matic muscle in the orang with the small zygomatic 



^y 



'l^h''/i 



Fig. 49.— Head-muscles of a Alonjalese negro. 1, 2, Occipilo-frontalis. 3, 3', 

 Orbicularis palpebrarum. 4, Pyramidalis nasi. 4', Levator labii superioris. 6, 

 Levator labii superioris alaeque nasi. 6', Compressor naris. 7', Levator anguli 

 oris. 8, 8', Zygomatici major et minor. 9, Orbicubiris oris. 9', Levator menti. 

 9", Depressor labii inferioris. 9"', Depressor anguli oris. 11, Masseter. 13, 

 Buccinator. 14, Platysma. 15, Trapezius. 17, 18, Attollens and attrahens 

 aureui. 19, Embedded temporal muscle. 20, Retrahens aurem. 21, Sterno- 

 nia>toid. 22, Deeply set muscles of neck. A, Tendinous aponeurosis. C, 

 Zygoma. Pj, I'arotis. *, Stensonian duct. 



in man. In the orang, the gibbon, and the baboon, 

 as well as in Innus sinicus and Ateles, I myself was 

 quite able to trace a division into a large and small 

 zygomatic. In the gorilla dissected by me the 



