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 
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 
