04 Scientific Proceedings, Royal Dublin Society. 
which fig. 2a, in the above-mentioned Plate, gives some idea, 
though not quite correct in detail, which is due to the fact that 
it was copied from a dead specimen. Of the three joints of which 
it is composed the two first are long, and of equal length, the 
second being set on at an open angle, thus giving a ventral direc- 
tion to the lower portion, in which position it is mostly carried, 
the first joint being almost wholly withdrawn. The third joint is 
somewhat shorter than the others, and usually telescoped into the 
second, the tips of the toes_alone appearing beyond it—these latter 
are quite correct in the figure given in the Monograph. The 
whole foot is telescopic, and sometimes entirely concealed within 
the body. When fully extended it is of surprising length, quite 
equal to the length of the body, and extremely flexible. The 
foot glands are remarkably conspicuous, their large pear-shaped 
heads lying within the body, from whence the diminishing tubes 
descend to the toes. ‘The stomach, surmounted by two clear 
globose gastric glands, is very large, and when empty appears to 
be sacculated. The drawing of the head in the above figure is 
correct. JI have never seen it otherwise than truncate on the 
frontal margin, in the centre of which is the red eye at the 
anterior end of a very large brain, which descends deeply into 
the neck. The shape of the body is more oblong than fusiform, 
and rather flat on the ventral side. 
Its manners are those of a typical Furcularian, rapid, restless, 
voracious. It seems to feed almost exclusively upon a long, rod- 
like diatom, of an amber colour, with which the stomach is gene- 
rally distended, or rather extended, for they can be seen lying 
lengthwise from end to end within. I saw one creature attack a 
diatom half as long again as itself; it placed itself on a line with 
it, seized the end, and rammed it down in the most masterly style 
until it reached the end of the body, then, finding there was still 
a long piece projecting beyond its head, it reversed the action of 
the strong incurved forcipate trophi, hauled it all up again, and 
discarded it as a hopeless case. I have seen an empty frustule 
discharged, which still retained its shape. I have also seen a long 
oval egg, bearing a bright red eye at its anterior end, deposited 
upon the slide. The species is very delicate, and dies rapidly 
when captured. 
