368 K. MASUI: 
in contact with the nuclear wall (Figs. 22, 23). Sometimes two or three very 
small granules are found near a large one, the former, however, usually disap- 
pearing in later stages. Bodies similar to these were found by many 
investigators in some mammals and in lower animals, and received 
the name of chromatoid corpuscles. But their origin and function are still a 
question. Although they stain intensely either with iron-haematoxylin or 
DELAFTELD’S haematoxylin, it is not possible to determine whether they 
originate within the nucleus or in the cytoplasm. 
During the prophase of the first reduction division the chromatoid 
corpuscle, i. e. the one that remains, rapidly enlarges and becomes more 
prominent, and comes to be placed close to the chromosomes as the nuclear 
membrane disappears, but is always distinguishable from them by its smaller 
size (Fig. 30). 
During the first reduction division sometimes one or two extra small 
bodies again make their appearance (Figs. 42, 44, 45), which in the anaphase 
do not divide, but usually lie close to the spindle, often directly upon it and 
sometimes within it (Figs. 39, 44, 45). These, except in very rare cases, 
disappear in the telophase, and when the new cell wall is formed in the 
daughter cell it remains with the mitosome (PLATNER) or Spindelrestkörper 
(Meves) close to the cell-plate (Fig. 46). The secondary spermatocytes are, 
as said before, of two kinds, the one with and the other without the chromatoid 
corpuscle. During the resting stage of the same it attains its maximum 
growth, and sometimes a vacuole appears in it (Figs. 49, 51). Its position 
in this stage is quite variable, but it is mostly placed near the cell wall 
(Figs. 49—51). 
In the second reduction division the chromatoid corpuscle repeats the 
same behavior as in the first, but the extra bodies were not found in this 
division (Figs. 57, 58), and as it also passes without division into one of the 
daughter cells (Fig. 58), it 1s found approximately in one-fourth of the total 
spermatids. Its position in early stages of the spermatids is not fixed, but 
it is situated more commonly on the posterior side of the nucleus (Figs. 61, 
63, 64), and when the elongation of the tail begins it moves further backward 
from the nucleus to find its final position in the middle region of the tail 
(Figs. 68, 71). Its fate in succeeding stages is not determined but it is most 
