266 ALDROVANDA VESICULOSA. (Cuar. XIV. 
tips two or three straight prickles instead of one. The 
bilobed leaf appears also to be rather larger and somewhat 
broader, with the pedicel by which it is attached to the 
upper end of the petiole a little longer. The points on the 
infolded margins likewise differ; they have narrower bases, 
and are more pointed; long and short points also alternate 
with much more regularity than in the European form. 
The glands and sensitive hairs are similar in the two forms. 
No quadrifid processes could be seen on several of the 
leaves, but I do not doubt that they were present, though 
indistinguishable from their delicacy and from having 
shrivelled; for they were quite distinct on one leaf under 
circumstances presently to be mentioned. 
Some of the closed leaves contained no prey, but in one 
there was rather a large beetle, which from its flattened 
tibiz I suppose was an aquatic species, but was not allied to 
Colymbetes. All the softer tissues of this beetle were com- 
pletely dissolved, and its chitinous integuments were as 
clean as if they had been boiled in caustic potash ; so that it 
must have been enclosed for a considerable time. The glands 
were browner and more opaque than those on other leaves 
which had caught nothing; and the quadrifid processes, 
from being partly filled with brown granular matter, could 
be plainly distinguished, which was not the case, as already 
stated, on the other leaves. Some of the points on the 
infolded margins likewise contained brownish granular 
matter. We thus gain additional evidence that the glands, 
the quadrifid processes, and the marginal points, all have the 
power of absorbing matter, though probably of a different 
nature. 
Within another leaf disintegrated remnants of a rather 
small animal, not a crustacean, which had simple, strong, 
opaque mandibles, and a large unarticulated chitinous coat, 
were present. Lumps of black organic matter, possibly of 
a vegetable nature, were enclosed in two other leaves; but 
in one of these there was also a small worm much decayed. 
But the nature of partially digested and decayed bodies, 
which have been pressed flat, long dried, and then soaked in 
water, cannot be recognised easily. All the leaves contained 
unicellular and other Alga, still of a greenish colour, which 
had evidently lived as intruders, in the same manner as 
occurs, according to Cohn, within the leaves of this plant in 
Germany. 
