The processes within the bladders are quadrifid, with the four diverging arms of equal length. The prey which they had captured consisted of entomostracan crustaceans.
Utricularia multicaulis (Sikkim, India, 7000 to 11,000 feet).--The bladders, attached to rhizomes, are remarkable from the structure of the antennae. These are broad, flattened, and of large size; they bear on their margins multicellular hairs, surmounted by glands. Their bases are united into a single, rather narrow pedicel, and they thus appear like a great digitate expansion at one end of the bladder. Internally the quadrifid processes have divergent arms of equal length. The bladders contained remnants of articulate animals. [page 445]
POLYPOMPHOLYX.
This genus, which is confined to Western Australia, is characterised by having a "quadripartite calyx." In other respects, as Prof. Oliver remarks,* "it is quite a Utricularia."
Polypompholyx multifida.--The bladders are attached in whorls round the summits of stiff stalks. The two antennae are represented by a minute membranous fork, the basal part of which forms a sort of hood over the orifice. This hood expands into two wings on each side of the bladder. A third wing or crest appears to be formed by the extension of the dorsal surface of the petiole; but the structure of these three wings could not be clearly made out, owing to the state of the specimens. The inner surface of the hood is lined with long simple hairs, containing aggregated matter, like that within the quadrifid processes of the previously described species when in contact with decayed animals. These hairs appear therefore to serve as absorbents. A valve was seen, but its structure could not be determined. On the collar round the valve there are in the place of glands numerous one-celled papillae, having very short footstalks. The quadrifid processes have divergent arms of equal length. Remains of entomostracan crustaceans were found within the bladders.
Polypompholyx tenella.--The bladders are smaller than those of the last species, but have the same general structure. They were full of dbris, apparently organic, but no remains of articulate animals could be distinguished.
* 'Proc. Linn. Soc.' vol. iv. p. 171. [page 446]
GENLISEA.
This remarkable genus is technically distinguished from Utricularia, as I hear from Prof. Oliver, by having a five-partite calyx. Species are found in several parts of the world, and are said to be "herbae annuae paludosae."
Genlisea ornata (Brazil).--This species has been described and figured by Dr. Warming,* who states that it bears two kinds of leaves, called by him spathulate and utriculiferous. The latter include cavities; and as these differ much from the bladders of the foregoing species, it will be convenient to speak of them as utricles. The accompanying figure (fig. 29) of one of the utriculiferous leaves, about thrice enlarged, will illustrate the following description by my son, which agrees in all essential points with that given by Dr. Warming. The utricle (b) is formed by a slight enlargement of the narrow blade of the leaf. A hollow neck (n), no less than fifteen times as long as the utricle itself, forms a passage from the transverse slit-like orifice (o) into the cavity of the utricle. A utricle which measured 1/36 of an inch (.705 mm.,) in its longer diameter had a neck 15/36 (10.583 mm.) in length, and 1/100 of an inch (.254 mm.) in breadth. On each side of the orifice there is a long spiral arm or tube (a); the structure of which will be best understood by the following illustration. Take a narrow ribbon and wind it spirally round a thin cylinder, so that the edges come into contact along its whole length; then pinch up the two edges so as to form a little crest, which will of course wind spirally
* "Bidrag til Kundskaben om Lentibulariaceae," Copenhagen 1874. [page 447]
round the cylinder like a thread round a screw. If the cylinder is now removed, we shall have a tube like one of the spiral arms.