314 N. M. Stevens. 



Fig. 46. Two primary germ cells of S. bipunctata still in the gastrula wall, 

 showing the 'besondere Korper' (K). 1.5 mm.-6. 



Fig. 47. Two sections of the two primary germ cells of S. bip. in mitosis, show- 

 ing 'bes. Korper' (K). 1.5 mm. -6. 



Fig. 48. Section of the four primary germ cells of S. bip., showing 'bes. Kor- 

 per' (K) in one cell. 1.5 mm. -6. 



Fig. 49. Two primary germ cells of S. el. preparing for mitosis. 'Bes. Korper. ' 

 in delayed cell. 1.5 mm. -4. 



Fig. 50. Two sections of first two primary germ cells of S. infl., showing 'bes. 

 Korper.' 2 mm.-4. 



Fig. 51. Four primary germ cells of S. infi. 1.5 mm. -6. 



Fig. 52. Four primary germ cells of S. infl., early stage, as seen in gastrula 

 cavity. 2 mm. -4. 



Fig. 53. Oogonium in metaphase, S. bip. 2 mm. -12. 

 Figs. 54 and 55. Oogonia in anaphase. 2 mm.-12. 



Fig. 56 a. Two young oogonia without granules, and b an oogonium in pro- 

 phase with granules. 1.5 mm. -6. 



