Platner (’85) saw a true nebenkern. I have already criticized the use of the word “nebenkern,” as the name for the spindle remains in the spermatocytes. Platner himself later denied the nuclear origin of the nebenkern. His results (’86, 2) agree with mine concerning the uniting, converging, staining and bending of the spindle-fiber remains and their passing to the tail. Again, Platner (’89, 1) probably followed the centrosome and attraction sphere, as well as the nebenkern, in the second part of the paper on _Helix_ and _Paludina_. In the pancreas the body is a result of secretion, and is not a nebenkern. In _Pygæra_ Platner’s large mitosome is the real nebenkern, as shown by its fibrous structure, its surrounding clear space and destiny. His small mitosome is what I have described as the acrosome, and he is mistaken as to its final use. The body he called centrosome in the nucleus is the persisting accessory chromosome. Such would be my interpretation of his figures. Henking (’91) has followed the spermatid changes in _Pyrrhocoris_ quite carefully. He finds that the fibers between the chromatin masses are separated into peripheral fibers and central spindle fibers. The first, a part of the second and the yolk mass, forms the nebenkern, which passes down over the axial filament. The rest of the central fibers form the mitosome. This takes its position at the angle between the nebenkern and the nucleus. On the surface of the nucleus it passes to the anterior end, then back to its original position. A piece now is constricted off and disappears, while the rest, increasing its affinity for stains, again wanders to the anterior pole of the nucleus, and becomes the acrosome. The large amount of yolk substance is a disturbing element in _Pyrrhocoris_, but the nebenkern agrees with that of _Gryllus_ in having the same origin and destiny, as does also the acrosome in fate and position. Besides, there is much similarity in the stages, as seen by comparing Henking’s fig. 63 with my fig. 25, and his fig. 85 with my fig. 32. Wilcox (’95 and ’96) described the spermatid metamorphosis in _Caloptenus_. The interzonal fibers, a long, striated body composed very plainly of distinct fibers, contracts longitudinally, and the corners round themselves off, and this forms the nebenkern. It loses its fibrous structure, comes close to the nucleus, and then grows out into the axial filament. The centrosome moves half way around the nucleus and lies between the latter and the nebenkern. Later the centrosome becomes the middle piece.