309 



Fig. IO2. Structure of Salivary Gland. (A} fresh ; (B) stained. 

 D main duct ; D l = duct ; Ac = acinus ; A = -finely granular 

 cells not yet possessing secretion ; B = coarse granules which become 

 changed into secretion ; C = globules of secretion ; A 1 , J? 1 , C 1 . = 

 the same cells set free ; M.Ac = mature acinus filled with secretion ; 

 U .Ac undeveloped acinus ; N .A == remains of nymphal acinus ; 

 G.C = Granular cell ; A 1 , A* = granules of secretion. 



