260 THE ENTOMOSTRACA OF EPPING FOREST.
from 1889 onwards (57), have included many species from
ponds within the Epping Forest area. In January, 1892, a
note on the males of the Cladocera was published in Science
Gossip (80), and later in the same year, in a paper on " Some
new records of British Cladocera " (81), six species were
added to the then known British fauna, all of which were
from the district under consideration. Lastly, the paper
already alluded to, on the Entomostraca of Wanstead Park
(82), issued in 1893, gave a' list of sixty species, together
with some notes on seasonal distribution, &c.
Before entering into the discussion of the actual results
obtained, just one other point must be mentioned. It has
been stated above that the present paper is to be regarded
as an expansion of the one on the Entomostraca of Wanstead
Park. It must not be supposed, however, that the basis of
collected facts is quite the same in each case. In the records
from Wanstead Park an attempt, a very rough one it is true,
was made to collect systematically. The records from the
remaining parts of the Forest district, on the other hand,
have been made almost at random. The only pre-arranged
plan, if it is worthy of the name, has been to get collections
from as many different stations as possible, and as often as
opportunity allowed. The result of this is that, whilst the
list of species shows a very marked increase upon the Wanstead
Park record, the facts concerning periodicity and some other
matters cannot be strictly compared in the two cases. Further
allusion will be made to this subject in connection with the
seasonal distribution of the species.
I propose now, following the plan of the earlier paper, to
make a few remarks on the chief results of the study of the
Epping Forest Entomostraca, and then to give some detailed
notes upon all the species observed. (See Part III.)
Total number of species recorded.
From the list given in Table I., it will be seen
that the total number of species recorded has been 102,
comprising Cladocera 47, Branchiura 1, Ostracoda 22, and
Copepoda 32. This is an increase of 42 upon the
Wanstead Park list of 1892, and of more than 20 upon
the total published records from the whole district to
date. Taken as a whole, the present is, I believe, the most