i.i8 



running through its whole length, and that the 

 secretory cells form a single row around this. 



3. Observe that each secretory cell has a 

 large mass of clear secretion within it, forming 

 the chief bulk of the cell, and that the nucleus is 

 flattened and pushed to the periphery (Fig. 36). 

 Pressure tends to force the secretion out of the cell 

 in viscid looking droplets. The secretion of the 

 lateral glands is far more refractile than that of 

 the central (Fig. 38). 



J hll)TO-\0Ui 



Fig. 37- 



Sporozoits in the Salivary Gland 



:iforozoiis in ine oani 

 (Fresh preparation) 



4. Ascertain that the duct formed by the 

 junction of the three intra-acinar ducts joins, 

 eventually, the similar duct from the other side, to 

 form a common salivary duct which passes into 

 the salivary receptacle. The duct is thick walled, 

 and is lined with a spiral thread resembling a 

 tracheal tube. 



