545. The superficial layer of the muscles of facial expression and their relation to the platysma myoides. Depressor anguli oris or triangularis menti muscle, risorius muscle, zygomaticus major muscle, levator labii superioris alaeque nasi, levator labii superioris proprius, and zygomaticus minor muscles, orbicularis palpebrarum muscle. The anterior portions of the occipitofrontalis muscle- the frontalis and the pyramidalis nasi muscles. Auricularis superior or attollens auriculam and auicularis anterior or attrahens auriculam muscles. The epicranial aponeurosis, the percranium, the parotideomasseteric fascia.