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Ch. 17

Utricularia clandestina.

This North American species, which is aquatic like the three foregoing 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, but it appears that they are lined with quadrifid processes, A vast number of captured animals are were found within them; some being Crustaceans, but the greater number delicate, elongated largo larvae, I believe suppose of Culicidae. On some stems: fully nine out "of every ten bladders contained their large or their their larvæ or its their remains," They "showed signs of life from twenty four to thirty six hours after they were imprisoned," & then perished."

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Ch 17

stage of development were not of quite equal length; & this fact is intelligible, on the view that the if I am right in believing that the antennæ represent two divisions of the leaf arising from the end of the bladder; for with the true leaves whilst very young, the divisions are never, as far as I have seen strictly opposite to each other; so that they must be developed one after the other, & so it would be with the two antennæ.

At a much earlier age when the half-formed bladders when are about 1/300th inch (.0846mm) in diameter or a very little more, they present a totally different appearance. as is represented on the left side of the accompanying drawing. (fig 24)

The young divis leaves at this age are not linear but have broad & flattened segments with the incipient future divisions and bifurcations or segments 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 & of one margin bearing with an incipient bifurcation division