MICROSCOPIC LIFE OF THE " LEAF-CARPET." 239
Corythion. C. dubium occurred in the great majority of
samples and C. pulchellum in eight.
Lecythium. L. hyalinum, seen only in one sample.
Capsellina. C. tumida, also seen only in one sample.
Pseudodifflugia. A small form, but probably P. fulva, was
recorded on three occasions.
HELIOZOA.
Members of this group were very infrequent in the samples of
leaf-carpet examined. The form occurring the greatest number
of times, only four altogether, was very minute (7-12µ) and not
sufficiently well characterised for determination of its exact
systematic position. It appeared to have neither special
covering nor radiating spines and might therefore be regarded
perhaps as a very small species of Actinophrys. Another
species seen on two occasions was almost certainly Acanthocystis
myriospina. Two other forms each occurred only once,
namely, undetermined small species of Raphidiophrys and
Pompholyxophrys.
FLAGELLATA.
Colourless Flagellates occurred in all the samples of leaf-
carpet examined. The commonest forms were species, not as
a rule definitely identified, of Bodo and Cercobodo, while species of
Cercomonas, Oicomonas, and Monas were seen in a number of
cases. Rhynchomonas nasuta was found in three samples and
Bicoeca lacustris (?) in two. Several other small Flagellates
which could not be definitely placed generically were also seen
from time to time.
The group of the Eugleninae, all colourless forms, was repre-
sented by species of Astasia, Menoidium, Petalomonas, Hetero-
nema (H. acus). Notosolenus and Entosiphon (? E. sulcatum, but
only 14µ). These Eugleninoides were, however, seen only on a
few occasions, the most frequent (four times) being the species
of Menoidium.
The one species of Petalomonas seen (figs. 8 and 9) appeared to
come nearest to P. sexlobata, Klebs, but instead of having
posteriorly six short blunt inwardly curving processes it had four
rather long pointed diverging straight processes. Two opposite
processes were rather farther apart than the other pair owing to