Dissection of Sheep's Head. 213 



the gland ; they should be traced deep down in front of the 

 external auditory meatus, internal to the auricular branch of 

 the Facial, and there left for the present. The Nerve of 

 which some of the branches have been thus traced back, is 

 the Auricula- Temporal Nerve, a branch of the larger sub- 

 division* of the Inferior Maxillary division of the Fifth or 

 Trigeminal nerve. At the point at which we leave it, it has 

 just turned up between the external ear and the condyle of 

 the jaw, under cover of the Parotid ; and we have seen it 

 escape from beneath this structure and divide into several 

 branches, some of which are branches of communication with the 

 facial nerve, which they meet on the superior border of the 

 Masseter muscle. 



Lastly, the duct that intervenes between the two branches 

 of the Facial Nerve should be traced in a curved horizontal 

 direction (like the middle of the letter co), across the Masseter 

 muscle ; at first inclined to follow the direction of the Cervico- 

 facial nerve ; then, about an inch from the border of the 

 Gland, curving upwards to the angle of the Mouth, which it 

 passes by; and finally opening on the inner surface of the cheek 

 by a small orifice opposite the second molar tooth of the upper 

 jaw. In dissecting this out, it will be of great assistance to 

 pass a bristle along it, or a fine probe, to give the direction. 

 Yery frequently the middle part of the duct is removed with 

 the skin, but even then both ends should be traced; the 

 anterior inch, which is much dilated as it perforates the buc- 

 cinator muscle, and passes in company with the facial vein 

 internal to the facial nerve and artery, being readily found 

 in the detached gland connected with the Parotid, viz., 

 the Glandula Socla Parotidis, situated at the angle of the 

 mouth, and whose duct opens into that of the Parotid. The 



This, the larger hranch of the Inferior Maxillary, receives only a few 

 filaments from the motor root ; and hence is more of a sensory than of a motor 

 nerve. 



