Salivary Qlands and Jaws. 



Fig. 23. 

 A B 



87 



B— Part of 

 glands shov- 

 ing Epithelial 

 cells. 



jt— •Glands. 



^—Thoracic glands. 



A— Duct of thoracic glands. 



c— Ducts of cephalic glands. 



«n— Sub mentum. " 



b— Opening to mouth. 



»n— Meatum. 



a— Opening to paraglos 



(Fig. 23, A), two pair in the head — one pair not down — the 

 other in the thorax. These glands are compound and lined 

 with epithelium (Fig. 23, B). The function of these glands 

 is yet in doubt. Mr. Frank Cheshire thinks that the pair 

 not shown in the figure secrete the early food of all the 



