PLATE I I. 



Serous alveolus 





Mucmis ulveohts 



Crescents ofGianvzzi 



:^e% .... 



'&* ... & 



Supporting connective tissue 



] . Section of submaxillary gland showing both mucous and serous alveoli, x 250. 

 (Stained with hcematoxylin.) 



' 



Before secretion (resting) After secretion (active) 



2. Section of serous gland, x 300. (Stained vrith borax carmine.) 



Mucvus cells 



Crescents of 

 Gianuzzi 

 (very large) 



Connective tissue 



An acinus 



Intermediate duct 



leading from acini of gland 



to intralobular duct 



Blood-vessel 



Duet (intralobular) 



3. Section of mucous gland (after secretion), x 300. (Stained with picrocarmine.) 



Geo'WatersTon.t Sons.Lith, Editi. 



