316 THE ENTOMOSTRACA OF EPPING FOREST.
Simocephalus exspinosus, De Geer.—Daphnia vetula
(in part probably), Baird (2). This form is distinguished by
such small characters from the preceding that it was not
separately recorded during the earlier part of the work on the
Epping Forest Entomostraca. It appears to be a common
species in the Epping Forest district.
Daphnia magna, Strauss.—D. schaefferi, Baird (2); D.
magna, Brady (20). This, the largest species of the genus,
seems to be almost solely an inhabitant of little duck-ponds.
The six Epping Forest stations have been, three duck-ponds at
Sewardstone, one on Theydon Bois Green, Woodridden Farm
Pond, and a little roadside pond near Queen Elizabeth's Lodge,
Chingford. The "ephippia" have also been seen in the
"Green Man" pond, Leytonstone.
Daphnia pulex, De Geer.—Baird (2). Brady (20).
Daphnia obtusa, Kurz. — Creighton (26). Brady (20).
Daphnia lacustris, Sars.—Brady (20); D. longispina (in
part), Scourfield (82). Prof. Brady (20) considers this to be
distinct from the following species. As both forms occur in the
Epping Forest district, I have entered them as independent
species in this list, although the records for the two have not
been kept separate.
Daphnia longispina, O. F. Muller.—D. pulex var.
longispina, Baird (2); D. longispina, Brady (20), Scourfield (82).
Daphnia hyalina, Leydig.— Scourfield (81), Brady (20).
Daphnia ? galeata, Sars.—D. galeata, Scourfield (81 and
82). By comparison with specimens of D. galeata kindly sent to
me by Prof. Sars, I have been able to see that our Epping
Forest form is not only not a typical representative of the species,
but that it may even be quite distinct. As I cannot decide,
however, to which of the other hyaline species it belongs, I
have preferred to continue to refer it doubtfully to D. galeata.
The typical D. galeata has been recorded as British by Prof.
Brady (20).
Daphnia ? cucullata, Sars. -? D. kahlbergensis, Brady (20).
This form, which I have recorded in the paper on the Entomo-
straca of Wanstead Park (82) as D. cucullata, is almost exactly
similar to the foregoing species, but is without the eye-spot. It
is certainly not a characteristic representative of D. cucullata,
but, on the other hand, it cannot with greater certainty be
referred to any other species.