446 
J. BRONTE GATENBY. 
bodies in the spermatogonium and young spermatocyte 
(see PL 25, fig. 45). It is only after the formation of 
the chromophobe medulla that the acid completely destroys 
the male mitochondria. 
Other Cytoplasmic Bodies. 
In Orgyia antiqua there are numerous large granules 
which are drawn in PI. 24, fig. 24, X.G., and X.M.; these 
are rarely of a size, bnt almost always there is a very large 
granule ( X.G .) which goes to one or the other daughter- cell 
in divisions. This large body always has a clear centre and 
is a constant factor ; in the spermatid it becomes carried out. 
to the end of the cell and finally sloughs off (PI. 24, fig. 23). 
There are other bodies of smaller size (X.M.) which are probably 
of the same nature as the last mentioned. Besides these 
one finds much smaller granules (G), which are very evident 
especially in division. For this reason Orgyia is unsuitable 
material for following out any cytoplasmic bodies except 
mitochondria, for there are so many granules that confusion 
arises. Even in the sperm atogonial divisions large granules 
are present. One concludes that these granules are excretory 
in nature, and are therefore of little importance from the 
point of view of this paper. Were further material at 
my disposal it might be possible by suitable methods to 
detect differences in these granules, but this has not been 
possible with Flemming with reduced acetic acid and iron 
hmmatoxylin. Probably Miss Cook's “chromatin granule" 
in Acronycta sp. is an excretory granule, or at least a body 
of the same nature as one of those mentioned above in 
Orgyia. In nearly all spermatids in Pieris, Smerinthus 
and others there is a mass of excreted matter sloughed off 
(see PI. 23, figs. 15 and 17; PL 24, figs. 23, etc.) during 
spermatozoon formation . 
Abnormalities. 
Though a very large number of gonads of y several species 
were examined nothing abnormal in relation to the sex was 
/ 
