392 M.S. B. Schnetzler on the Aériferous 
the laciniated leaf, whilst the interior cells of the pedicel place 
themselves in communication with the tissue forming the veins, 
of which they subsequently appear to be acontinuation. As 
the pedicel thus becomes a prolongation of a segment of the 
leaf, the little globular body which it supports appears to us to 
be a portion of the parenchyma of the same leaf. The walls of 
the little cellular body, of which the extremity first hollows into 
a cup, become developed, whilst the bottom remains stationary ; 
these walls finally unite, and thus form a closed cavity. In the 
utricles thus formed in Utricularia minor we see towards the so- 
called mouth pinnatifid prolongations or appendages, similar to 
the capillary segments of the true leaves, in such a manner that 
the perfect utricle appears to be an expansion of the parenchyma 
of the leaf, supported upon a vein which is prolonged and rami- 
fied beyond the utricle. The extremity, which is at first open, 
becomes closed at length by two unequal folds of the walls. 
There is thus formed a sort of funnel, clothed with hairs, at the 
bottom of which the folds appear as two dark bands bearing 
linear hairs, whilst those which occur at the entrance are usually 
capitulate. 
Although the utricles, at the commencement of their forma- 
tion, make their appearance at the angles of the leaf-segments, 
this position is by no means constant when we examine them in 
more advanced phases, when the leaf itself is modified. 
The pedicellate globules of Benjamin often occur far enough 
from the angle of the segments: in Utricularia minor we even 
see them sometimes at the extremity of the divisions of the leaf. 
We therefore cannot infer from their position their analogy to 
buds. It will be easily understood, from what precedes, that 
the pedicellate globules of Benjamin and the little horn-like 
bodies of Schleiden are nothing but intermediate phases between 
the first commencement of the utricle and its definitive form. 
The anatomical examination of the perfect utricle further 
confirms us in this view. The walls of the utricle consist of two 
layers of angular cells, at first of a very bright green colour. In 
the intercellular canals we see at the earliest periods some small 
conical cells, which terminate within and without in a small 
rounded cell; the interior cell afterwards forms the base of the 
quadrifid hairs, the formation of which we have already described 
according to Schacht. 
This author does not mention the exterior cells, which are 
always seen in great numbers, even on the young utricles of 
Utricularia minor, in the form of little flattened globules, often 
subsequently divided into two; these globules likewise occur on 
the other parts of the segmented leaf, where they appear in the 
form of little mushrooms, of which the stipes buries itself 
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