JOURNAL OF ENTOMOLOGY AND ZOOLOGY 147 
between the ova around the edge of the follicle to form a sort 
of lining layer. These were probably undifferentiated ova and 
nurse cells. In the spermatic follicles columns of spermatogonia 
were usually found in the upper part and bunches of sper- 
matozoa in the lower. Between these are columns showing 
several different stages. From the hermaphroditic gland ex- 
tends a long slender duct to the ampulla. In all the specimens 
examined it was found packed full of spermatozoa. In the dis- 
tended condition it is a large, pear-shaped sac, with a wall 10 
microns thick. There is no epithelial lining layer, apparently. 
From the ampulla extends a short, ciliated duct. It soon 
divides into two parts, the male duct, which is very small and 
lined with short cilia, and the larger female duct, lined with 
very long, strong cilia. This strongly ciliated duct is rather 
short and opens into a lamellated portion lined with ordinary 
short cilia. The lamellated portion divides almost at once into 
two parts, one leading to the spermatotheca, the other to the 
oviduct. 
The duct to the spermatotheca, or rather from the sperma- 
totheca, gradually becomes smaller and after a somewhat wind- 
ing course enters a mass of circularly disposed muscle fibres, 
the arrangement of which would indicate that they act as a 
valve. In the center of this muscle mass is a small chamber 
from which three ducts pass,—the above mentioned duct which 
joins it to the oviduct, a duct to the spermatocyst, and a duct 
to the spermatotheca. The duct to the spermatocyst is small 
and the spermatocyst itself is a small, thin-walled, oval sac, 
lined with short columnar cells which appear ciliated although 
not prominently so in the preparations. In one animal sec- 
tioned the spermatocyst was empty, in the others it was packed 
full of spermatozoa and distended to twice or more than twice 
its size when empty. In the one animal in which the sperma- 
toeyst was empty all the female organs were dormant and ova 
were not developing in the hermaphroditic gland, while the 
glands of the male organs were active and spermatozoa were 
found in some of the passages; in all the other animals, the 
female organs were in a state of activity. 
