144 
J. O. SIDDALL. 
Lieherkiihnia with that of Haliphysema appears to me inter- 
estiug, as corroborative of the conclusions suggested by Prof. 
Lankester’s paper, viz. that Haliphysema is correctly placed 
among arenaceous” Foraminifera. The affinity existing 
between these two forms is further demonstrated by the 
scattered spiculiform bodies with wffiich the integument of 
Lieherhuhnia is invested. 
The orifice or mouth of Lieberkuhnia, as seen when the 
creature was crawling mouth upwards on the thin glass 
cover of a cell, is situated at its broader extremity in a 
depression formed by the infolding of the four lobes of 
the integument, taking the contour of a square whose 
angles are carried outwards into projecting points (PL XVI, 
fig. 9). The sarcode stolon is shown in the sketch as a 
small oval spot in the centre of the square — the pseudopodia 
which arise from it having been omitted to avoid confusion. 
To the life history of LieherkhUnia I can add little to 
what has been already recorded, but the following may not 
be devoid of interest as illustrating its voracity and its 
general appearance whilst feeding. 
On the 5th of October last I found a very fine specimen 
anchored to the side of a bottle, and transferred it to a cell by 
means of a camel-hair pencil. When examined under the 
microscope it was found to be in the act of trying to swallow 
a living worm quite twice as long as itself, which it had 
evidently seized whilst in the bottle, retaining its hold 
upon it even when taken up by the brush for transfer to 
the cell. The means adopted to accomplish deglutition 
were somewhat singular. Having got one end into its 
mouth, the Lieberkuhnia passed a thick stream of sarcode 
along the worm to its furthest extremity, the creature mean- 
while making feeble efforts to escape from the glairy mass. 
Then, having got well hold of its prey, and anchored itself to 
the glass by an outspread network of pseudopodia, it pro- 
ceeded slowly and deliberately to envelop it, partly by re- 
tracting the thick band of sarcode, and partly by advancing 
its own body. This process continued until the pointed end of 
the worm was pressed so tightly against the lower extremity of 
the Lieberkuhnia as to almost burst the integument, when, 
finding it could engulf it no further, more sarcode flowed from 
the interior of the Rhizopod over the worm, until it was 
completely enclosed (PI. XVI, figs. 10 and 11). Matters re- 
mained thus for some time, the rotation of the sarcode going 
on with unusual rapidity meanwhile, and the pseudopodia 
being spasmodically emitted and retracted in all directions. 
After a couple of hours, by a process the reverse of swallow- 
