Fig. 28. A little later than fig. 27.
Fig. 29. Shows cross-sections of elongating nebenkern; a shows axial filament, nebenkern and acrosome; in b the axial filament is cut at an angle.
Fig. 30. A little later than fig. 28; the axial filament not so plainly shown.
Fig. 31. The ring has disappeared, and the dark mass is passing down along the filament. The acrosome is indistinct.
Fig. 32. The nebenkern has disappeared, but the acrosome has kept its position.
Fig. 33. The acrosome has flattened against the nucleus. Some remains of the nebenkern are seen.
Fig. 34. The acrosome has moved to the side of the nucleus. Some nebenkern remains are shown.
Fig. 35. The acrosome is in front of the nucleus.
Fig. 36. A little later stage than fig. 35.
Fig. 37. Shows a divided acrosome. It is not a frequent appearance.