THE SALIVARY GLANDS 49 



of the animal, throughout most of their length. Trace the 

 two submaxillary (Wharton's) ducts, each of which leaves 

 the anterior end of one of the glands and courses cephalad 

 to the opening on the ventral surface of the buccal cavity. 

 In following the ducts avoid injury to the blood vessels 

 of this region. The masses which lie anterior to the sub- 

 maxillary glands between the rami of the lower jaw are 

 said to be lymph glands. 



Exercise XIII. Sketch a ventrolateral view of the head showing 

 these glands and their ducts. 



