CYTOPLASMIC INCLUSIONS OF THE GERM-CELLS. 605 
In the spermatogonia derived after many divisions the 
batonettes ultimately form the rectangular figure drawn on 
PL 34. They are fewer in number, but, as often happens 
with the mitochondria, generally bigger, though not in- 
variably (compare PL 32, fig. 24 a, and Pl. 33, fig. 36). 
Curiously enough, in different examples the arclioplasm 
seems to be variably demonstrable, and these differences do 
not depend altogether on the depth of penetration of fixative, 
and the consequent possibility of different degrees of staining. 
Murray ( 8 ) considers that the archoplasmic and batonette 
material are interconnecting, the rod being, as it were, a 
thickened edge of the idiozome. This is apparently true in 
some cases (see Text-fig. 4, V.A.R.). In others the batonette 
is separate. 1 do not think that this exceptional apparent 
intercommunication between idiozome and Nebenkern rods is 
evidence in favour of the view that the batonettes are a part 
of the spindle apparatus. 
Summary. 
(1) The ovotestis of Helix aspersa is formed of finger- 
like diverticula. The latter are hollow at their lower ends, 
which connect to the hermaphrodite duct, while the upper 
ends contain more yolk, and are filled completely with meta- 
morphosing male cells. 
(2) According to the manner of derivation — that is, the 
nutrimental conditions of the locality from which new cells 
arise, and the number (if any) of times which these new cells 
divide — there are quite wide differences in the individual 
generations derived from and under such varying conditions. 
(3) These differences are found in nucleus, mitochondria, 
Nebenkern, and general cell volume. 
(4) The mitochondria vary in size and number, and such 
variation seems to be caused by the varying number of 
spermatogonial divisions in different regions of the ovotestis. 
(5) In the early spermatid smaller mitochondria, the micro- 
mitochondria appear in an unknown way near the region 
from which the axial filament takes its origin from the centro- 
