242 THE ESSEX NATURALIST.
In addition to the above I have myself noted Callidina multis-
pinosa, Monostyla sp. (M. cornuta or lunaris ?) and Colurella sp.,
the first named on only two occasions, the other two several times.
As regards the species in Mr. Bryce's list I cannot give any further
particulars as to their relative frequency except that I have seen
Adineta barbata on many occasions and regard it as a characteris-
tic member of the leaf-carpet fauna.
In connection with the Rotifer recorded as Encentrmn sp.,
Mr. Bryce said it was unknown to him. The possibility is,
therefore, that it was a new species, but this point unfortunately
cannot now be determined.
GASTROTRICHA
In only three samples have I seen representatives of this
group. It would appear therefore that these little creatures
are of rather exceptional occurrence in the leaf-carpet. The
forms seen were undetermined species of Chaetonotus and
Lepidoderma.
NEMATODA.
Nematodes of one sort or another were always present. It
was not, however, possible to determine their names in most
cases, but species of the following genera were pretty certainly
seen:—Prismatolaimus, Rhabdites, Mononchus, Tylenchus,
Criconema and Bunonema. The species of the first named genus
was probably P. dolichurus and was seen on many occasions. The
most characteristic perhaps was, however, Bunonema richtersi,
which is a remarkable form having a series of sixteen or more
pairs of papilla: projecting strongly from the ventral side. Another
species of the same genus, B. reticulatum, was also seen a few
times. In this species the ventral pairs of papillae are scarcely
if at all noticeable, but there is a very pretty pattern on the back
formed by diagonally crossing rows of minute granules. The
species of Criconema was apparently C. guerni.
OLIGOCHAETA.
Very small Oligochaetes were often seen. The commonest
was certainly a species of Aeolosoma, probably A. hemprichi (or ?
A. quatemarium). Another form appeared to be either a species
of Paranais or Ophidionais.