no 



force the secretion out of the cell in viscid looking 

 droplets. The secretion of the lateral glands is far 

 more refractive than that of the central (Fig. 46). 



4. Ascertain that the duct formed by the 

 junction of the three intra-acinar ducts joins, eventu- 

 ally, the similar duct from the other side, to form a 



**. CtJ 



Fig. 45. Sporozoits in the Salivary Gland 

 (Fresh preparation) 



common salivary duct which passes into the salivary 

 receptacle. The duct is thick walled, and is lined with 

 a spiral thread resembling that of a tracheal tube. 



EXAMINATION OF THE SPOROZOIT FORM OF THE 

 MALARIAL PARASITE 



Obtain a number of Anophelines (not M. rossi) 

 from a native quarter (five per cent, to twenty per 

 cent, or more have sporozoits in the glands), or Anophe- 

 lines fed for twelve days or more at a temperature of 



