GERM CELLS OF GRYLLOTALPA 289 



V/ <& j&* Ms 1jM 







••A 



•••• 



Text fig. 1 Gryllotalpa borealis. A, B, C, oogonial divisions, 24 chromo- 

 somes; D, E. F. G. H. I, J. spermatogonial divisions, 23 chromosomes; K, L, M, 

 first spermatocyte divisions, 12 chromosomes; N, O, P, side views of an early 

 anaphase, first spermatocyte division, drawn at different levels in the same cell, 

 to show all the chromosomes. (Note the position of the single unpaired chromo- 

 some and the precocious separation of the unequal pair). 



JOURNAL OP MORPHOLOGY, VOL. 28, NO. 1 



