PLATE 5 



EXPLANATION OF FIGURES 



32 Section through the cranial end of the coelom of a larva 35 mm. long, 

 showing a nest of germ cells in the fat-body above the mesonephros. 



33 Section through the germ-gland region of a larva 4| cm. long, showing 

 nests of germ cells in different parts of the mesonephros. 



34 Section of the germ gland of a larva 21.5 mm. long. 



35 A magnified portion of the germ gland of a larva 25 mm. long, showing the 

 inward migration of peritoneal cells to form follicles around the germ cells. 



36 Section of the germ gland of a larva 21.5 mm. long, showing scattered germ 

 cells and mesenchyme cells. 



37 Section of the germ gland of a larva 25 mm. long. 



38 Section of the germ gland of a larva 27.5 mm. long, showing a cyst of 

 germ cells surrounded by follicle cells. The outlines of the individual germ cells 

 are represented. 



39 Section through the same gland as in figure 38 showing a cyst with dividing 

 cells. Some of the germ cells of the cyst are in a resting stage. 



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