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GENERAL ZOOLOGY 



FIG. 44. Development of a grasshopper's egg; A, an unsegmented egg con- 

 taining a single nucleus near the center; B, an egg in which the original nucleus 

 has divided many times and the daughter nuclei are arranged around the out- 

 side of the egg; C, a later stage in which the yolk material is completely enclosed 

 by cells; D, the thickening on one side indicates the beginning of an embryo; 

 E, embryo partly overgrown by amnion; E', cross section of same; F, amnion 

 and serosa completely covering embryo; F', cross section of same;G, insect with 

 appendages forming. 



