108 DR. E. KLEIN. 
son. The epithelium consists of a superficial layer of conical 
epithelial cells, about 0:032 mm. long, each with an oval 
nucleus ; their free basis, which is on the surface, appears covered 
in some places with fine cilia, similar to those described above 
of the lateral wall of the organ of Jacobson. Both in the lateral 
and median wall I have seen in some places indications of fine 
cilia still connected with the surface of the épithelial cells, while 
in others there were no cilia in connection with the cell bases, 
but there were minute rods and cilia-like bodies near the surface 
of the cells held together by a mucous coagulum. From this it 
appears probable that the cilia have become detached from the 
surface of the cells. In some places a great many of the epithe- 
lial cells are converted into goblet cells, with or without mucus 
in their interior. 
Away from the surface the cells are drawn out into a single 
or branched fine process. Between these are packed-in spindle- 
shaped cells, each with a spherical or slightly oval nucleus. In 
some places, especially in the median wall, these spindle-shaped 
cells are very conspicuous, there being a considerable amount 
of protoplasm around the nucleus, but in other places they 
appear very minute. Underneath these cells and forming the 
inner or lower boundary of the epithelium is a stratum com- 
posed of one or two, or in some places of the median wall, 
even three, layers of small spherical or oval nuclei, closely placed 
side by side; to each nucleus belongs a very narrow zone of 
protoplasm, hence the nuclei form in this stratum the most pro- 
minent part. They are more deeply stained than the nuclei of the 
other cells. Their cell protoplasm is of a polyhedral or conical 
or angular shape, but is always inconsiderable. 
In some places of the upper and lower sulcus the spindle- 
shaped cells are much more numerous than the other cells, and 
hence the appearance is produced not unlike that of the sensory 
epithelium of the organ of Jacobson. 
Branched lacunz are seen extending from the subepithelia 
membrane into the epithelium itself, where fine canaliculi pass 
from the lacunz between the individual epithelial cells, 7. e. into 
the interstitial cement substance. These lacune and their cana- 
liculi are best seen in oblique or horizontal sections through the 
epithelium of the tube, and they correspond to the lymph-cana- 
licular system known of the epithelium of other membranes. 
One of the most striking appearances is the presence, in about 
the middle of the epithelium, of spherical or oval cavities; each 
of them appears limited, and consequently separated, from the epi- 
thelial cells by a very delicate membrane, and hence may be spoken 
of as an intraepithelial vesicle, the smallest of them being about 
0-014, the largest about 0-05 in diameter. They occur ina single 
