GERM CELLS AND THEIR FORMATION 



117 



FIG. 63. Diagrams of the egg-tubes (ovaries) of Insects. After Korschelt 

 and Heider. A. Orthoptera, without groups of nutritive cells. B. Coleoptera, 

 with many such groups. C. Hemiptera, with terminal nutritive group and 

 nutritive channels extending to the ova. c, nutritive channel; /, egg follicle; 

 m, zone of multiplication; n, nutritive cells; o, ova. 



