CELLS IN DIVISION 



of spermatogenesis in Oenacanthus and other members of the Orthop- 

 teran family Gryllidae, both in living and fixed material; in the sper- 

 matogonia they are short rods and become V-shaped during the 



\ 



n 



Figure 38 Stages in the spermatogenesis of Oenocanthus to show the centrioles. x 3200. 

 a Living spermatocyte of Oe. quadipunctatus and b Fixed spermatocyte of Oe. nigricornis at 

 pachytene. The V-shaped centrioles are seen at opposite poles of the nucleus, c Meta- 

 phase of meiosis I, and d Early spermatid, Oe. nigricornis. The axial thread connects 

 centriole and terminal vesicle. From Johnson"' {By courtesy, Z- wiss. ZooL). 



109 



