Salivary Glands and Jaws. 



Fig. 23. 

 A B 



87 



B— Part of 

 (glands show- 

 ing Epithelial 

 cellg. 



.4— Glands. 



0— Thoracic glands. 



d— Duct of thoracic glands. 



c— Ducts of cephalic glands. 



««i— Sub mentnm. 



b— Opening to mouth. 



in— Mentum. 



a— Olienlng to paraglos 



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

 These glands are compound, and are lined with epithelium 

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

 Justin Spaulding; from -whose article 1 get my, diagram. 

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



