JOURNAL OF ENTOMOLOGY AND ZOOLOGY 149 
in large droplets. I have not determined the exact relation of 
these glands to the oviduct, but in the dormant specimen the 
glands are separate and open into the oviduct by numerous 
channels, and in active specimens, for at least a portion of its 
course, the oviduct is separate. The oviduct ends in a large 
opening with folded walls, situated in back of and somewhat 
below the other two genital openings. 
The male branch of the common duct is very short and opens 
into a large, thin-walled, convoluted, glandular sac. The walls 
of this sac are lined with columnar epithelium about 50 microns 
high, which seems to consist entirely of mucus cells. The upper 
portion of nearly all the cells is empty and presents the char- 
acteristic appearance of mucus cells, there being only a little 
protoplasm gathered around the spherical dark-staining nuclei 
at the base of the cells. 
It is possible that these cells possess cilia, as there is usually 
a condensation of substance just beyond their upper borders, 
but this may be a secretion product, and, if it does indicate cilia, 
these cilia are very small and scanty. Near the end of the 
glandular sac, the cells at one side become changed in character. 
They remain about the same length as the mucus cells, but 
become more closely packed, so that the nuclei which lie at the 
extreme base, lie side by side, almost touching each other. The 
cells are full of dark-staining secretion for about half their 
length. The upper half is much less dense, but contains the same 
substance, which is being thrown off into the lumen, where it 
collects in droplets. This area of secreting cells gradually widens 
so as to include the whole of the end of the gland, which soon 
narrows down into a ciliated duct. The duct gradually de- 
creases in size and the epithelial cells become shorter, while a 
surrounding layer of circularly placed muscle fibres becomes 
gradually thicker, until it passes into a tube, where it opens 
into a wide canal, lined with very short, strongly ciliated cells 
and surrounded by a heavy muscular wall. The .external open- 
ing is large, and the lining membrane is thrown into folds. 
