STUDIES ON GEKM CELLS 



385 



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- Fig. 1 Chironomus (redrawn from Hasper, '11). A, longitudinal section 

 • xrough the posterior end of a freshly laid egg. B, longitudinal section through 

 egg during division of first four cleavage nuclei; at posterior end primordial germ 

 cell is just being formed. C, one of primordial germ cells containing two nuclei 

 and remains of 'Keimbahnplasma.' D, germ gland of the larva in which remains 

 of 'Keimbahnplasma' still appear. Kbpl, 'Keimbahnplasma'; p.g.c, primordial 

 germ cell. 



