GLAND STRUCTURES. 



75 



knife (made, by heating a large needle, beating it 



Fig. 16.— Salivary (?) Glands of the Bee. 



A, Salivary (?) Glands, Systems No. 1, No. 2, and No. 3, magnified fifteen times— sv, 

 Salivary Valve (of Systems No. 2 and No. 3) at Root of Tongue; lp, Labial 

 Palpus ; mx, Maxilla ; so. Salivary Opening of System No. 1 in Hypo-pharyngeal 

 Plate; no, Openings in Plate for Termination of Taste Nerves; te, (Esophagus ; 

 sd, Salivary Duct ; b, Junction of Ducts of System No. 2 ; c, Junction of Ducts 

 of System No. 3; sc,sc, Salivary Sacs;./?, Front Lobe ; hi, Back Lobe ; a, Chitinous 

 Duct, with Spiral Thread. B, Single Acinus of System No. 1, magnified seventy 

 times—/), Cell Nucleus ; st, Salivary Track ; d, Large Duct. C, Single Pouch, or 

 Acinus, from System No. 2— a, Propria, or Outer Membrane ; se, Secreting 

 Cells. D, Termination of System No. 3—1 2, 3 4, lines marking Termination of 

 Section ; d, Duct, in section "; sc, Secreting Cell, in section ; n, Nucleus. 



flat, and afterwards sharpening upon a hone, and 



