arms, it passes into the top of the hollow neck. Whether the arms are
open or closed at their extremities could not be determined, as all the
specimens were broken; nor does it appear that Dr. Warming ascertained
this point.
FIG. 29. (Genlisea ornata.) Utriculiferous leaf; enlarged about three
times. l Upper part of lamina of leaf. b Utricle or bladder. n Neck of
utricle. o Orifice. a Spirally wound arms, with their ends broken off.
So much for the external structure. Internally the lower part of the
utricle is covered with spherical papillae, formed of four cells
(sometimes eight according to Dr. Warming), which evidently answer to
the quadrifid processes within the bladders of Utricularia. [page 448]
These papillae extend a little way up the dorsal and ventral surfaces
of the utricle; and a few, according to Warming, may be found in the
upper part. This upper region is covered by many transverse rows, one
above the other, of short, closely approximate hairs, pointing
downwards. These hairs have broad bases, and their tips are formed by a
separate cell. They are absent in the lower part of the utricle where
the papillae abound.
FIG. 30. (Genlisea ornata.) Portion of inside of neck leading into the
utricle, greatly enlarged, showing the downward pointed bristles, and
small quadrifid cells or processes.
The neck is likewise lined throughout its whole length with transverse
rows of long, thin, transparent hairs, having broad bulbous (fig. 30)
bases, with similarly constructed sharp points. They arise from little
projecting ridges, formed of rectangular epidermic cells. The hairs
vary a little in length, but their points generally extend down to the
row next below; so that if the neck is split open and laid flat, the
inner surface resembles a paper of pins, the hairs representing the
pins, and the little transverse ridges representing the folds of paper
through which the pins are thrust. These rows of hairs are indicated in
the previous figure (29) by numerous transverse lines crossing the
neck. The inside of the neck is [page 449] also studded with papillae;
those in the lower part are spherical and formed of four cells, as in
the lower part of the utricle; those in the upper part are formed of
two cells, which are much elongated downwards beneath their points of
attachment. These two-celled papillae apparently correspond with the
380