424 UTRICULARIA NEGLECTA. Cuar. XVIL 
ammonia, from a putrid infusion of raw meat, and from 
urea. The glands apparently are acted on more 
strongly by a solution of urea, and less strongly by 
an infusion of raw-meat, than are the processes. The 
case of urea is particularly interesting, because we 
have seen that it produces no effect 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 spontane- 
ously 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 Utri- 
cularia 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 ter- 
minate 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 
vulgaris are about ;4, inch (254 mm.) in diameter 
(or zt, in the case of Utricularia neglecta), they are 
circular in outline, with a narrow, almost closed, trans- 
verse orifice, leading into a hollow filled with water ; 
but the bladders are hollow when much under ++, of 
an inch in diameter. The orifices face inwards or 
towards the axis of the plant. At this early age the 
bladders are flattened in the plane in which the orifice 
lies, and therefore at right angles to that of the 
mature bladders. They are covered exteriorly with 
papilla of different sizes, many of which have an 
elliptical outline. A bundle of vessels, formed of 
