280 Allen . — The Spermatogenesis of Poly trichum juniperinum. 
the apical body and the limosphere, is generally if not invariably present. 
This body — hereafter referred to, because of its staining properties, as the 
percnosome — is variously located ; thus, in Fig. 33 it is shown near the apical 
body ; in Fig. 35, close to the limosphere and in contact with the posterior 
part of the nucleus ; in Fig. 32, between the limosphere and the posterior 
part of the blepharoplast ; in Fig. 31 (and perhaps in Fig. 30, where the 
percnosome is partly hidden by the nucleus) it is close to the posterior 
end of the blepharoplast. In the androcyte shown in Fig. 34 the perc- 
nosome was not seen, although it appeared in other cells in the same 
antheridium. The dark object lying over the apical body in Fig. 27, 
although comparatively small, is probably also the percnosome. As 
already noted, at still earlier stages in the history of the androcyte a 
single small cytoplasmic body is often present, sometimes lying in 
a vacuole. At later stages, also, there is commonly a single small, darkly 
stained granule located somewhere in the cytoplasm (Figs. 38, 39, 42), 
towards the close of the history usually in a vacuole (Fig. 47), and appa- 
rently becoming smaller (Figs. 48-50) as the development of the antherozoid 
proceeds. Occasionally at these, as at earlier stages, there is more than one 
darkly stained cytoplasmic granule (Figs. 4 1 , 44, 46) ; but in such a case 
one of the bodies is usually darker and more definite in outline than the 
others. If these various appearances are properly to be interpreted as 
evidencing the persistence of the percnosome during the greater part of the 
history of the androcyte, it is evident that this body is very small at its 
first appearance, later grows considerably, and then in turn diminishes 
in size. 
In Fig. 35 still another rounded body appears in the cytoplasm near the 
posterior end of the blepharoplast, and not far from the apical body, though 
at a somewhat different depth. In the cell from which this figure was 
drawn, the body in question was stained orange, as was also the apical body, 
while the percnosome was dark red, as is usual in triple-stained preparations. 
The orange-stained body in question was not seen in any other androcyte. 
Possibly it is to be classed among the disintegration products of those parts 
of the cytoplasm that are not used in the construction of the antherozoid ; 
indeed, the same suggestion might be made regarding the percnosome but 
for the fact that its apparent long persistence seems to indicate for it some 
more special significance. 
As the development of the body of the antherozoid proceeds, the 
volume of the androcyte cytoplasm gradually diminishes. The cell as 
a whole becomes more and more flattened or lenticular, its short axis being 
perpendicular to the plane in which the coiled body of the antherozoid 
approximately lies. This change of form is apparent in androcytes which, 
like those shown in Figs. 43 and 45, are so placed as to show the coiled 
nucleus more nearly in edge than in side view. Fig. 50 shows two anthero- 
