364 FREDA M. BACHMANN. 





EXPLANATIONS OF THE FIGURES. 

 All figures were outlined with the aid of a camera lucida. 



PLATE I. 



FIGS, i AND 2. Germ cells in lateral part of mesoderm. X 390. 



FIG. 3. Formation of ccelome. Germ cells in splanchnic layer. X 390. 



FIG. 4. A nest of germ cells in somatopleure. X 390. 



FIG. 5. Germ cells migrating toward mesentery. X 390. 



