to the lamellae.

Besides the free calciferous cells in which no nucleus was visible,
other and rather larger free cells were seen on three occasions;
and these contained a distinct nucleus and nucleolus. They were
only so far acted on by acetic acid that the nucleus was thus
rendered more distinct. A very small concretion was removed from
between two of the lamellae within an anterior gland. It was
imbedded in pulpy cellular matter, with many free calciferous
cells, together with a multitude of the larger, free, nucleated
cells, and these latter cells were not acted on by acetic acid,
while the former were dissolved. From this and other such cases I
am led to suspect that the calciferous cells are developed from the
larger nucleated ones; but how this was effected was not
ascertained.

When an anterior gland contains several minute concretions, some of
these are generally angular or crystalline in outline, while the
greater number are rounded with an irregular mulberry-like surface.
Calciferous cells adhered to many parts of these mulberry-like
masses, and their gradual disappearance could be traced while they
still remained attached. It was thus evident that the concretions
are formed from the lime contained within the free calciferous
cells. As the smaller concretions increase in size, they come into
contact and unite, thus enclosing the now functionless lamellae;
and by such steps the formation of the largest concretions could be
followed. Why the process regularly takes place in the two
anterior glands, and only rarely in the four posterior glands, is
quite unknown. Morren says that these glands disappear during the
winter; and I have seen some instances of this fact, and others in