342 UTRICULARIA NEGLECTA. (Cuap. XVII. 
on Drosera, the leaves of which are adapted to digest fresh 
animal matter. But the most important fact of all is, that 
in the present and following species the quadrifid and bifid 
processes of bladders containing decayed animals generally 
include little masses of spontaneously moving protoplasm ; 
whilst such masses are never seen in perfectly clean bladders. 
Development of the Bladders.—My son and I spent much 
time over this subject with small success. Our observations 
apply to the present species and to Utricularia vulgaris, but 
were made chiefly on the latter, as the bladders are twice as 
large as those of Utricularia neglecta. In the early part of 
autumn the stems terminate in large buds, which fall off and 
lie dormant during the winter at the bottom. The young 
leaves forming these buds bear bladders 
in various stages of early development. 
When the bladders of Utricularia vul- 
garis are about +1, inch (+254 mm.) 
in diameter (or 5), in the case of 
Utricularia neglecta), they are circular 
in outline, with a narrow, almost 
closed, transverse orifice, leading into 
a hollow filled with water; but the 
bladders are hollow when much under 
14y of an inch in diameter. The 
orifices face inwards or towards the 
Fic, 23. axis of the plant. At this early age 
(Utricularia vulgaris.) the bladders are flattened in the plane 
Longitudinal section through in Which the orifice lies, and therefore 
in length, With te oie we at right angles to that of the mature 
widely open, bladders. They are covered exteriorly 
with papillz of different sizes, many 
of which have an elliptical outline. A bundle of vessels, 
formed of simple elongated cells, runs up the short footstalk, 
and divides at the base of the bladder. One branch extends 
up the middle of the dorsal surface, and the other up the 
middle of the ventral surface. In full-grown bladders the 
ventral bundle divides close beneath the collar, and the two 
branches run on each side to near where the corners of the 
valve unite with the collar; but these branches could not be 
seen in very young bladders. 
The accompanying figure (fig. 23) shows a section, which 
happened to be strictly medial, through the footstalk and 
between ihe nascent antenne of a bladder of Utricularia 
