610 Gideon S. Dodds. 



EXPLANATION OF FIGURES 



31. Two genn-cells from embryo 11 D. They have reached the somatic meso- 

 blast and the pronephric duct is in process of formation. X 1260. 



32. A germ-cell from embryo 12 G. The pronephric duct has become separated 

 from the coelom. X 1260. 



33. Two germ-cells from embryo 13 H. They lie in the dorsal peritoneal wall 

 which had become very thin, leaving the large germ-cells standing out prominently. 

 X 1260. 



34. A group of five germ-eells from embryo 14 0. They are massed at the base 

 of the mesentery and are seen to be surrounded by flattened cells, the future follicle 

 cells. The nuclei of three of these germ-cells show the changes which begin at this 

 time. X 1260. 



