426 UTRICULARIA NEGLECTA. Cuar. XVII. 
must therefore be developed one after the other, and 
so it would be with tne two antenne. 
At a much earlier age, when the half formed 
bladders are only +4, inch (0846 mm.) in diameter 
or a little more, they present a totally different ap- 
pearance. One is represented on the left side of the 
accompanying drawing (fig. 24). The young leaves 
Fie, 24. 
(Utricularia vulgaris.) 
Young leaf from a winter bud, showing on the left side a bladder in its earliest stage 
of development, 
at this age have broad flattened segments, with their 
future divisions represented by prominences, one of 
which is shown on the right side. Now, in a large 
number of specimens examined by my son, the young 
bladders appeared as if formed by the oblique folding 
over of the apex and of one margin with a prominence, 
against the opposite margin. The circular hollow 
between the infolded apex and infolded prominence 
apparently contracts into the narrow orifice, wherein 
the valve and collar will be developed; the bladder 
itself being formed by the confluence of the opposed 
