584 
F. H. EDGE^yOETH. 
condylar processes. The Anlage of the masticatory muscles has 
divided into medial and lateral parts, each of which is imper- 
fectly separated into muscles, which consist of groups of 
spindle-shaped cells. The medial part consists of the follow- 
ing : the internal pterygoid, which arises from the ala 
temporalis and is inserted into the mandible, it shows the 
beginning of a division into two parts. The tensor veli 
palatini lies just internal to the upper end of the internal 
Fig. 69. 
temp m... 
pterygoid with a free anterior end ; it passes backwards 
above the hinder margin of the internal pterygoid and has a 
free posterior end. The tensor tympani lies immediately 
above and in contact v/ith the hinder part of the tensor veli 
palatini, with a free anterior end ; it passes backwards and 
inwards to the side of the malleus. The lateral part of the 
Anlage of the masticatory muscles consists of the following : 
the temporal, which has an oblique slightly concave inner 
edge; its upper extremity extends up outside the Gfasserian 
ganglion, but has no dorsal attachment; it is inserted into 
the coronoid process. The external pterygoid arises from 
the ala temporalis behind the anterior fibres of the temporal 
and is inserted into the condylar process of the Anlage of the 
