Salivary Glands and Jaws. 



Fig. 23. 

 A B 



87 



B— Part ol 

 glands show- 

 . Ing Epithelial 

 cells. 



^—Glands. 



^—Thoracic glands. 



d— Duct of thoracic glands. 



o— Ducts of cephalic glands. 



«7?i— Sub mentum. 



6 — Opening to mouth. 



m— Mentum. 



a— Opening to paraglossae. 



(Fig. 23, A), one pair in the head, the other in the thorax. 

 These glands are compound, and are lined with epithelium 

 (Fig. 23 £). This apparatus was first discovered by Mr. 

 Justin Spaulding, from whose article I get my diagram. 

 From these glands comes the so-called salivary juice, which 



