586 
J. BRONTE GATENBV. 
cytoplasm, but in a few cases one finds what seems to be an 
archoplasmic mass ( A.R .) upon which may be stuck from two- 
to four Nebenkern rods. This is so seldom found at this 
stage that I do not think it is the rule. The wide open 
reticulum now breaks into a loose spireme and a contraction 
figure is shown in PI. 32, fig. 21. 1 In this cell the mitochon- 
dria were rather irregular in shape, here and there undoubtedly 
ring-like, but they were all collected to one side of the 
nucleus towards where the chromatin filaments converged. 
It will be noticed that the nucleoplasm in this kind of male 
cell generation is abnormally large for the amount of chro- 
matin spireme. The diplotene stage and the rest of the pro- 
phases soon take place and the growth period begins. The 
Text-fig. 3, i, shows that at X. Y. and at other parts these cells 
are losing their attachment to the walls. In Text-fig. 4, i, 
the cell Y. is just falling into the lumen, while X. has already 
arrived there. The contraction figures below belong to 
another cell generation. In PI. 32, fig. 23, a typical cell just 
after the beginning of the growth stage is shown. The 
attachment to the germinal epithelium consists only of a 
small area (Xj) which will soon part. The mitochondria are 
dispersed in the cytoplasm, and outside the nuclear membrane 
(at N.K.) is a cloud in which can be seen embedded a very 
large number of small Nebenkern rods. These are slightly 
curved. This is the usual way in which the Nebenkern 
appears in this generation. PI. 32, fig. 25, is a later stage. 
Subsequent stages are drawn in PL 32, figs. 22, 25, 26, and 
27, and have been described. 
It seems that in this generation the nucleus after the pro- 
phases collapses somewhat in size, proportionate to the normal 
amount of chromatin contained therein. It will be noted that 
no spermatogonial divisions take place. 
Pachynema. 
