346 UTRICULARIA CLANDESTINA. [OmiP. XVII. 
smaller than those of Utricularia neglecta. The leaves bear fewer 
and shorter bristles, and the bladders are more globular. ‘The antenna, 
instead of projecting in front of the bladders, are curled under the 
valve, and are armed with twelve or fourteen extremely long multi- 
cellular bristles, generally arranged in pairs. These, with seven or 
eight long bristles on both sides of the peristome, form a sort of net 
over the valve, which would tend to prevent all animals, excepting 
very small ones, entering the bladder. ‘The valve and collar have the 
same essential structure as in the two previous species; but the glands 
are not quite so numerous; the oblong ones are rather more elongated, 
whilst the two-armed ones are rather less elongated. The four bristles 
which project obliquely from the lower edge of the valve are short. 
Their shortness, compared with those on the valves of the foregoing 
species, is intelligible if my view is 
correct that they serve to prevent too 
large animals forcing an entrance 
through the valve, thus injuring it; 
for the valve is already protected to a 
certain extent by the incurved antenne, 
together with the lateral bristles. ‘The 
bifid processes are like those in the 
previous species; but the quadrifids 
differ in the four arms (fig. 25) being 
ig 6s directed to the same side; the two 
ee longer ones being central, and the two 
shorter ones on the outside. 
The plants were collected in the 
middle of July; and the contents of 
five bladders, which from their opacity seemed full of prey were 
examined. ‘lhe first contained no less than twenty-four minute fresh- 
water crustaceans, most of them consisting of empty shells, or includ- 
ing only a few drops of red oily matter; the second contained twenty ; 
the third, fifteen; the fourth, ten, some of them being rather larger 
than usual; and the fifth, which seemed stuffed quite full, contained 
only seven, but five of these were of unusually large size. The prey, 
therefore, judging from these five bladders, consists exclusively of 
fresh-water crustaceans, most of which appeared to be distinct species 
from those found in the bladders of the two former species. In one 
bladder the quadrifids in contact with a decaying mass contained 
numerous spheres of granular matter, which slowly changed their 
forms and positions. 
(Uiricularia minor.) 
Quadrifid process; greatly enlarged. 
UTRICULARIA CLANDESTINA. 
This North American species, which is aquatic like the three fore- 
going ones, has been described by Mrs. Treat, of New Jersey, whose 
excellent observations have already been largely quoted. I have not 
as yet seen any full description by her of the structure of the bladder, 
