3

U. Montana

(The largest tuber nearly 1 in. long, &. 45 broad, buried obliquely in the sand & moss.)

At further extremity prolonged into a branching Rhizome, bearing numerous bladders at the depth of another inch, & therefore at the depth of about 1 1/2 in from surface. [insertion:] Bladder at [foot]

Manifestly a development of the rhizome.

The largest bladder which I saw was under 1/20 of an inch, & I saw a great many. They must have been present by hundreds on this one plant. The bladders are full of water, no doubt absorbed by the papillæ from outside. The papillæ, which cover bladders, footstalks & rhizomes, are oblong, seated

4.

U. Montana

on short prominence & are lined by brownish utricle, often shrunk.

The ventral surface of bladder, (i.e. space between the footstalk & valve) very short, so that dorsal surface makes almost a circle. The prominence bearing the antennæ curved towards footstalk, & the antennæ themselves curved, lying on each side of the bladder, with their tips reaching about the middle.

From the curvature of the antennæ & their proximity to footstalk, only a little circular opening is left on each side to the depression in which the valve & opposed rim collar lies & which together form a deep pit.

The valve is small, moderately transparent, bears 4 spines (2 over 2) in usual place, with a few rudiments of glands, which differ little from the papillæ, except in being a little broadened transversely.

(5

U. Montana

The rim collar is stiff & yellowish brown, & is the same as usual except that it & the valve dip much deeper into the bladder, forming almost a tube. Moreover the lower part of the rim consists of colourless cells, bearing bifids. The slit-like orifice between valve & rim is quite distinct, but very small.

The quadrifids are sub-equal, rather short & thick. See sketch — in each there is a large spherical nucleus, which must be solid, as it breaks angularly. I have no doubt it is a nucleus, as it resembles the nuclei of cells of bladder. I could see no nucleolus.

The quadrifids are arranged somewhat concentrically. The bifids, instead of being thin & tapering are oval.

[5v]

Feeds on subterranean very minute insects

6

U. Montana

Examined many bladders & perfectly empty, like glass: but I found 1 with a minute mass of brown decaying matter, & I distinguished a leg or tarsus with 4 or 5 joints, with double hook at end of some insect, perhaps Thysanoura, or larva. This creature must have been extremely minute, for the bladder cd not have been 1th/30th of in in length & the opening is always relatively small to bladder.

Now the quadrifids all round the decaying mass abounded with spherical, transparent, yellowish more or less aggregated little masses, which when sketched continually changed their forms. (see sketch) Some of the sphere were nearly as bog in diameter as the spines.

Other spines only contained fine granular matter.

In a 2nd specimen there was a still smaller speck of brown pulpy matter, which was lost, but quadrifids here clearly shewed aggregation, just as above—

What tempts crawling insect to force their way in??