Scdioary Glamls and Jaws. 



Fig. 23. 

 A B 



87 



^—Glands. 



47— Thoracic glands. 



d — Duct of thoracic glands. 



c— Ducts of cephalic glands. 



S7ti — Sub mentum. 



b — Opening to mouth. 



Tn — Mentum. 



o— Opening to paraglos 



J3— Part of 

 glands show- 

 ing Epithelial 

 cells. 



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

 These glands are compound, and are lined with epithelium 

 (Fig. 23 -E). 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 



