PLATE 8 



EXPLANATION OF FIGURES 



62 Section of a polygerm showing divisions of the primary masses to form 

 secondary masses. X, Y, and Z, primary masses dividing. X 767 



63 Tertiary mass containing a single embryonic cell. The mass lies free in 

 the body cavity of the host. X 1267. 



64 Tertiary mass showing division of embryonic cell. Some of the nuclei 

 of the inner membrane are also dividing. X 1267. 



65 Tertiary mass which has recently divided. The component on the left 

 has a single embryonic cell; the one on the right has two which have not as yet 

 separated. X 1267. 



66 Tertiary mass showing the multiplication of embryonic cells. X 1267. 



67 Tertiary mass preparing for division. The embryonic cells are being 

 divided up into groups by the activity of the inner membrane. X 1267. 



68 Tertiary mass which has divided to produce three components. The 

 one on the right is preparing for another division. X 1267. 



60 



