These two-celled papillae apparently correspond with the bifid process in the upper part of the bladders of Utricularia.  The narrow transverse orifice (o, fig. 29) is situated between the bases of the two spiral arms.  No valve could be detected here, nor was any such structure seen by Dr. Warming.  The lips of the orifice are armed with many short, thick, sharply pointed, somewhat incurved hairs or teeth.

The two projecting edges of the spirally wound lamina, forming the arms, are provided with short incurved hairs or teeth, exactly like those on the lips.  These project inwards at right angles to the spiral line of junction between the two edges.  The inner surface of the lamina supports two-celled, elongated papillae, resembling those in the upper part of the neck, but differing slightly from them, according to Warming, in their footstalks being formed by prolongations of large epidermic cells; whereas the papillae within the neck rest on small cells sunk amidst the larger ones.  These spiral arms form a conspicuous difference between the present genus and Utricularia.

Lastly, there is a bundle of spiral vessels which, running up the lower part of the linear leaf, divides close beneath the utricle.  One branch extends up the dorsal and the other up the ventral side of both the utricle and neck.  Of these two branches, one enters one spiral arm, and the other branch the other arm.

The utricles contained much dbris or dirty matter, which seemed organic, though no distinct organisms [page 450] could be recognised.  It is, indeed, scarcely possible that any object could enter the small orifice and pass down the long narrow neck, except a living creature.  Within the necks, however, of some specimens, a worm with retracted horny jaws, the abdomen of some articulate animal, and specks of dirt, probably the remnants of other minute creatures, were found.  Many of the papillae within both the utricles and necks were discoloured, as if they had absorbed matter.

From this description it is sufficiently obvious how Genlisea secures its prey.  Small animals entering the narrow orifice—­but what induces them to enter is not known any more than in the case of Utricularia—­would find their egress rendered difficult by the sharp incurved hairs on the lips, and as soon as they passed some way down the neck, it would be scarcely possible for them to return, owing to the many transverse rows of long, straight, downward pointing hairs, together with the ridges from which these project.  Such creatures would, therefore, perish either within the neck or utricle; and the quadrifid and bifid papillae would absorb matter from their decayed remains.  The transverse rows of hairs are so numerous that they seem superfluous merely for the sake of preventing the escape of prey, and as they are thin and delicate, they probably serve as additional absorbents, in the same manner as the flexible bristles on the infolded margins of the leaves