210 Mammalia. 



the jaw, ventrad of the Zygomatic process ; and in a relative 

 position dorsad of the Zygoma is the situation of the coronoid 

 process of the jaw. 



Immediately above the cartilage of the Ear will be seen a 

 knob of muscle : this is the Temporalis vel Temporo- 

 maxillaris ; it fills up the Temporal fossa of the Skull. 



The limit of the Brain cavity anteriorly may be marked by 

 a line drawn between the orbits, just in front of the ridge of 

 the Frontal bones ; hence to expose the Brain with a view to 

 getting it out entire, the saw should be passed through the 

 skull bones in a horizontal line from the occipital condyle to 

 the middle of the Frontal ridge. 



Attached to the Head will be generally found the anterior 

 portion of the Trachea, recognised by its ringed structure ; 

 and dorsad of the Trachea, in close connection with it, the 

 anterior end of the CEsophagus. 



If a line be drawn from the outer margin of the occipital 

 condyle, passing just internal to the point of the par-occipital 

 process, to the outer margin of the QEsophagus ; such line 

 will pass the generally patent orifice of the cut end of the 

 * common carotid,* about an inch ventrad of the par-occipital 

 process. 



Dissection of Parotid Gland, &c. Placing the Head 

 with the side of the Face towards him, the Student 

 will first consider the position of the superficial structures 

 he is about to dissect, as follows : The Parotid Gland 

 lies almost in a straight line along the posterior margin 

 of the ramus of the jaw, coming round on to the face but 

 slightly at the angle of the jaw, but extending further for- 

 wards close by the Ear. From just within the anterior 

 margin of this gland, there issue across the face several 

 nerves and one duct, in the following order : first, there are 

 two fine nerves in a line from the ear to the angle of the 

 mouth ; half an inch below these, in a line from the occipital 



