416 UTRIOULARIA NEGLECTA. Cuap. XVIL 
We have seen with Drosera that the first effect of a 
weak solution of carbonate of ammonia on the cell- 
contents is the production of the finest granules, which 
afterwards aggregate into larger, more or less rounded, 
masses ; and that the granules in the layer of protoplasm 
which flows round the walls ultimately coalesce with 
these masses. Changes of this nature are, however, 
far more rapid in Drosera than in Utricularia. Since 
the bladders have no power of digesting albumen, 
cartilage, or roast meat, I was surprised that matter 
was absorbed, at least in one case, from a fresh infusion 
of raw meat. I was also suxprised, from what we shall 
presently see with respect to the glands round the 
orifice, that a fresh solution of urea produced only a 
moderate effect on the quadrifids. 
As the quadrifids are developed from papille which 
at first closely resemble those on the outside of the 
bladders and on the surfaces of the leaves, I may here 
state that the two hemispherical cells with which these 
latter papillae are crowned, and which in their natural 
state are perfectly transparent, likewise absorb car- 
bonate and nitrate of ammonia ; for, after an immersion 
of 23 hrs. in solutions of one part of both these salts 
to 437 of water, their primordial utricles were a little 
shrunk and of a pale brown tint, and sometimes finely 
granular. The same result followed from the immersion 
of a whole branch for nearly three days in a solution 
of one part of the carbonate to 1750 of water. The 
grains of chlorophyll, also, in the cells of the leaves 
on this branch became in many places aggregated 
into little green masses, which were often connected 
together by the finest threads. 
On the Absorption of certain Fluids by the Glands on 
the Valve and Collar.—The glands round the orifices of 
bladders which are still young, or which have been 
