Fig. 5 in Chloeia incerta de Quatrefages 1866

Fig. 5. Electron micrographs of testis in male stage of N. indica showing A. spermatocyte (arrow) at meiotic stage (equatorial plate formation) (2900 X), B. somatic accessory cells (2900 X), C extracellular tubules and nuclei of spermatozoa (6800 X), D. tails of spermatozoa showing striations and central lumen (13000 X), E. clustered spermatophore tails (13000 X), F. spermatophore associated with somatic accessory cells (4800 X), G. somatic accessory cell cytoplasm showing cell organelles (30000 X), H. head of spermatozoon (13000 X). sac- somatic accessory cell, sc- spermatocyte, c- somatic accessory cell cytoplasm, n- somatic accessory cell nucleus, n- somatic accessory cell nucleus, t- spermatophore tail, tstransverse striations, m- mitochondria, RER- Rough endoplasmic reticulum, l- lumen, n- nucleus, l- lumen, h- head, cr- chromatin, ect- extracellular tubules, a- acrosome.